How do I check the reputation of an angel investor before accepting their money?

Yes. Treat an angel investor like you would treat a key employee or business partner: you’re not just evaluating whether they can provide cash—you’re evaluating what happens after they own part of your company.

A practical investor due-diligence process

1. Talk to founders they have actually invested in

Ask the investor for 5–10 founder references, including:

• Someone whose company succeeded.
• Someone whose company struggled or failed.
• A founder they no longer work with.
• Ideally, someone who is not one of their hand-picked references.

Ask those founders privately:

• Did they do what they promised?
• Were they helpful after investing—or mostly hands-off?
• How did they behave when things went badly?
• Did they respect founder autonomy?
• Did they pressure you into decisions?
• Were there surprises in the investment documents?
• Did they introduce customers, employees, or later investors?
• Would you take their money again?
• What do you wish you'd known before taking their money?

That last question is often the most revealing.

2. Investigate their track record

Search the investor's full legal name, investment firm, previous companies, and portfolio companies. Don't rely solely on their LinkedIn or website.

Look for:

• Previous investments and exits.
• Companies that failed.
• Lawsuits and regulatory actions.
• Bankruptcy history.
• Controversies involving portfolio companies.
• Claims of investments that you can't independently verify.
• Multiple versions of their biography or unexplained gaps.

If they are a financial professional, check the SEC's Investment Adviser Public Disclosure (IAPD) and FINRA's BrokerCheck. These can show registration history, employment, qualifications, customer disputes, and certain regulatory/disciplinary disclosures.

Importantly, not appearing in IAPD/BrokerCheck isn't automatically a red flag for an angel. Many angels invest their own money and aren't acting as registered investment professionals.

3. Investigate how they behave, not just their reputation

A famous investor can still be a terrible investor for your company.

Pay particular attention to:

• Control: Do they want board seats, veto rights, or unusual approval rights?
• Follow-on financing: Can they block future fundraising?
• Information rights: What information will they demand?
• Founder vesting: Are they proposing unusual founder restrictions?
• Liquidation preferences: Especially anything beyond a straightforward 1× non-participating preference.
• Anti-dilution: Understand exactly what protection they're requesting.
• Personal guarantees: These deserve very careful scrutiny.
• Side agreements: Look for obligations outside the main financing documents.
• Behavior during negotiations: Excessive pressure before they're even invested is informative.

Have a startup attorney review the documents before you sign, particularly if the terms aren't standard.

4. Verify their money and ability to fund

You want to know whether the person actually has the resources they claim.

Ask:

"Can you provide evidence that you have the funds available to close this round?" Also clarify whether the investment is:

• Their own money.
• Money from a syndicate.
• Money from a fund.
• Dependent on another investor.
• Dependent on some future financing event.

If they say they're investing through a fund, understand who controls the fund and whether the person you're negotiating with actually has authority to make the investment.

5. Check whether they're an impersonator

This is increasingly important.

Don't verify someone using contact information they supplied in an unsolicited message. Independently find the investor's legitimate website/contact information and verify their identity.

The SEC specifically warns that imposters can misuse the names of legitimate investment professionals and even point people toward seemingly legitimate resources.

6. Ask them uncomfortable questions directly

I'd ask:

"What would cause you to lose confidence in me as CEO?" "What decisions would you expect to have a say in?" "Under what circumstances would you want to replace a founder?" "Tell me about an investment that went badly and how you handled it." "Can you introduce me to a founder whose company failed while you were an investor?" "Have you ever had a serious disagreement with a founder? What happened?" Their reaction can be more informative than the answer.

A good investor shouldn't be offended that you're doing diligence. They're asking you to trust them with ownership of your company, so due diligence is completely reasonable.

A simple red/yellow/green test

🟢 Green flags

• Multiple independent founders praise them.
• They're transparent about past investments and failures.
• They readily provide references.
• Their proposed terms are reasonable and understandable.
• They respect your attorney and diligence process.
• They have a reputation for helping without micromanaging.

🟡 Yellow flags

• Very aggressive negotiation.
• Unusually complex terms.
• Vague claims about their track record.
• They don't want you talking to existing portfolio founders.
• References are uniformly people they've carefully selected.
• They want substantial control for a relatively small investment.

🔴 Red flags

• Pressure to sign immediately.
• Refusal to provide verifiable references.
• Misrepresentations about their background or investments.
• Requests for money from you before investing.
• Suspicious email domains or identity inconsistencies.
• Threats, intimidation, or retaliation when you ask questions.
• Unexplained regulatory/legal problems.
• Terms that give them disproportionate control over the company.

The most important rule

Don't evaluate the investor separately from the term sheet. Evaluate the combination.

A wonderful angel with terrible terms can be a bad deal. A relatively unknown angel with reasonable terms, excellent founder references, useful expertise, and professional behavior can be a much better partner.

If you give me the investor's name, LinkedIn/website, and the basic terms they're offering (investment amount, valuation/cap, board rights, etc.), I can also walk you through a structured reputation and deal-risk check.

"Can you introduce me to a founder whose company failed while you were an investor?" "Have you ever had a serious disagreement with a founder? What happened?" Their reaction can be more informative than the answer.

Checking an angel investor’s reputation—often called "reverse due diligence"—is one of the most critical steps a founder can take. An investor is on your cap table for years, through highs and lows, so you need to know how they behave when things get tough.

A practical, step-by-step framework helps you vet an angel investor before signing a term sheet or cashing a check:

• Ask for References (Backchannel and Official): Request a list of 2–3 founders they currently back. More importantly, do backchannel references: look at their portfolio on LinkedIn or their website, find founders they backed who aren't on the reference list (or whose startups failed), and reach out to them cold. Ask: "How did they act when the company hit a rough patch?" or "Are they helpful or a micro-manager/phantom?"
• Check Public and Legal Records: Search local court dockets or public civil/criminal litigation databases for any history of lawsuits, fraud, or bankruptcies. If they claim to be an Accredited Investor (required by law in many jurisdictions), ensure they can verify it, especially if you are running a formal Regulation D round.
• Scan the Startup Ecosystem: Ask around in local or industry-specific founder Slack channels, Discord groups, or founder communities. Often, bad actors or notoriously difficult angels are well-known by word-of-mouth in the local startup scene.
• Look at Their Track Record and Behavior: Analyze their previous investments. Do they invest regularly, or do they write one small check and disappear? Do they add value via their network, or do they demand constant updates without offering meaningful introductions or advice?
• Review the Term Sheet Closely: Have a startup lawyer review their proposed terms. Toxic behavior often shows up in the paperwork—look out for unreasonable control provisions, excessive information rights for a tiny check size, or blocking rights for future financing rounds.

If you want to dive deeper, let me know:

• What stage is your startup at (pre-seed, seed)?
• Is this an individual angel or part of an angel group/syndicate?

I can give you a more tailored list of red flags to watch out for during the conversation.

Yes. Treat the investor like a key hire or business partner—not just a source of cash. You’re evaluating both whether they’re legitimate and whether you actually want them on your cap table.

1. Verify who they are

Start with their full legal name, investment entity, employer history, and claimed portfolio.

• Search their name + company + “lawsuit,” “fraud,” “complaint,” “SEC,” and “FINRA.”
• Verify that their LinkedIn/profile history matches independent sources.
• Check the companies they claim to have invested in. Look for evidence from the companies themselves, not just the investor's website.
• If they invest professionally or represent themselves as a financial professional, check SEC IAPD and FINRA BrokerCheck. These can show registrations, employment history, qualifications, and certain disciplinary/disclosure events.
• Check relevant state securities regulators as well.

Important: An angel investor doesn't necessarily need to be registered simply because they're investing their own money. So a clean BrokerCheck/IAPD result is useful, but absence from those databases isn't itself a red flag.

2. Do founder reference checks

This is probably the most valuable part.

Ask the investor for 5–7 founder references, including at least one company that struggled or failed. Ideally, independently find some founders yourself rather than relying entirely on their hand-picked references.

Ask references:

• How did they behave when the company missed targets?
• Did they respect the founder's decisions?
• Were they helpful or intrusive?
• Did they honor verbal commitments?
• How did they behave during a difficult financing or down round?
• Did they try to introduce themselves into operational decisions?
• Were there surprises in the investment documents?
• Would you take their money again?

The last question is especially useful.

Backchannel references are often more revealing than the references the investor provides.

3. Investigate their behavior, not just their résumé

A famous investor with impressive exits can still be a terrible investor for your company.

Look for evidence of:

• founder-friendly or founder-hostile behavior
• reputation for excessive control
• board interference
• unexpected demands after investing
• aggressive information rights
• attempts to renegotiate after you've verbally agreed
• disputes with co-investors
• confidentiality problems
• reputation for abandoning companies when things go badly

Also distinguish the individual angel from the firm or syndicate. The person who will actually interact with you matters more than the brand on their business card.

4. Examine the money itself

Ask where the investment is coming from and make sure the entity sending the money matches the entity in your documents.

Be particularly cautious if they:

• ask you to pay an upfront fee before they invest
• demand unusual payments to an intermediary
• create artificial urgency
• won't explain the source/entity of the funds
• want money sent somewhere unrelated to the investment
• keep changing the terms after you've agreed

An angel-investor due-diligence guide specifically flags upfront fees, pressure tactics, evasiveness, and unverifiable claims as warning signs.

5. Have a lawyer scrutinize the terms

Don't evaluate the investor separately from the deal.

A problematic investor can become substantially more problematic if you give them:

• a board seat
• veto/protective provisions
• unusual information rights
• excessive pro-rata rights
• founder-personal guarantees
• unusual redemption rights
• broad control over future financing
• unusual conversion or liquidation provisions

Have startup counsel review the actual term sheet and definitive documents, not just the headline valuation.

6. Look for the biggest signal: how they react to your diligence

Tell them you're doing reference checks and legal diligence.

A good response is essentially: “Of course—what else would you like to know?”

If they become angry, pressure you to skip references, discourage you from using a lawyer, or threaten to withdraw because you're asking reasonable questions, that's itself valuable information. Reference-checking is considered normal diligence among experienced investors.

My practical “before accepting money” test

I'd want these five boxes checked:

• Identity: I know exactly who the investor/entity is and can independently verify their history.
• Reputation: I've spoken to founders who have actually worked with them.
• Behavior: I understand how they act when things go badly, not just when things go well.
• Money: The funding source and transaction structure make sense.
• Terms: My lawyer is comfortable with the rights I'm giving them.

And one particularly useful question to ask yourself:

“If this company struggles badly in 18 months, would I still want this person sitting at my board table?” If the answer is no, don't let the attractiveness of the check obscure the cost of taking it.

I'd want these five boxes checked:

Checking an angel investor's reputation before taking their money is one of the smartest moves you can make as a founder. A bad investor can drain your time, sabotage future rounds, or make your life miserable, while a good one is a superpower.

Here is a step-by-step framework to vet an angel investor:

1. Talk to their portfolio founders (Backchanneling)
   • Ask the investor for a list of 3-5 founders they have previously backed.
   • Crucially, find 2-3 founders from their portfolio who weren't on their reference list by searching their LinkedIn or portfolio page and cold-emailing them.
   • Ask the unscripted questions: When things went sideways, how did they react? Are they helpful or micromanaging? Do they wire money on time?
2. Search public databases and community forums
   • Check platforms like AngelList to see their investment history, syndicate size, and activity level.
   • Look for discussions or feedback on community platforms like Hacker News or Product Hunt where investors might be named or reviewed.
   • Search local startup Slack/Discord channels or ask trusted local founders if anyone has horror or success stories.
3. Look at their track record and co-investors
   • Check their LinkedIn or personal website to see if they are a repeat angel or a first-timer.
   • Look at who they typically co-invest with. If they syndicate or invest alongside reputable institutional funds or well-known super-angels, that serves as a strong proxy of vetting by others.
4. Run a basic legal and background check
   • Search court records or litigation databases (like UniCourt or local county records) to ensure they aren't involved in active fraud lawsuits, bankruptcies, or messy shareholder disputes.
   • Ensure they are an accredited investor if required, though they should provide documentation/representation of this in the subscription agreement.
5. Observe their behavior during the diligence process
   • Pay attention to red flags early on: Are they ghosting you, haggling aggressively over minor terms at the last minute, or demanding unreasonable control/information rights for a tiny check size?
   • How they act before writing the check is the absolute best predictor of how they will act after they have your board seat or signature.

If you'd like, tell me:

• What stage is your startup in (pre-seed, seed)?
• How large is this investor's check relative to your round?

I can help you spot specific term sheet red flags to watch out for.

Here are top web results for exploring this topic:

Hustle Fund·https://www.hustlefund.vc How to Verify Startup Claims | Hustle Fund The most important verification step is investor reference calls. Before you accept money from a founder (yes, you're evaluating them as much as they're evaluating you), talk to other investors who've LinkedIn·https://www.linkedin.com Fake Angels and how to spot them. | Jem Stein - LinkedIn A fake angel is someone that calls themselves an angel investor, goes through due diligence processes with founders, but never actually makes investments. These people usually have an ulterior motives www.saastr.com·https://www.saastr.com/what-are-some-signs-that-an-angel-investor-is-really-a-devil-investor/What Are Some Signs That an “Angel Investor ” is Really a “Devil ...The terms are way, way, way too complicated. To me, this is flag #01 by far. Angel investing should be simple. What matters is price, check size, and maybe, pro rata rights in the next round (if you h Quora·https://www.quora.com How to tell if an angel investor is real and not a scammer - Quora Ask for references, either businesses s/he has invested in, or people s/he has co-invested with. If they are legit, they will give you that info and the references will check out. Upvote ·. 92. 91. Re US Angel Investment Network·https://www.angelinvestmentnetwork.us Advice on Avoiding Fraud - US Angel Investment Network Don't be afraid to ask the investors questions about their background. They should be keen to impress you and willing to answer any questions you might have. Most importantly you should be very carefu J.P. Morgan·https://www.jpmorgan.com How to Find the Right Angel Investor for Your Startup - J.P. Morgan Specialists have significant subsector expertise. For example, an angel investor in space tech may have spent their career at major companies in aerospace and defense. “Look at getting an angel invest Reddit·https://www.reddit.com How do you find trustworthy angel investors ? : r/business - Reddit LinkedIn is solid for this—search for investors who've backed similar businesses, and send personal messages explaining what you're building. Also, check out local angel investor groups and attend tra Wealthfit·https://wealthfit.com How to Find & Evaluate Angel Investors - Wealthfit As you start looking for angels, you'll notice that they often work together. They pass deals to each other, they collaborate on research, and they pool money together to increase their equity (and po Medium·https://medium.com Making your first angel investment? Here's your due diligence ...Understanding the market of the companies you're planning to invest in/having industry experience, allows you to make smarter decisions and help your Founder with their challenges by providing tangibl Founders Factory·https://foundersfactory.com**Angel investors** : An honest guide to finding & working with individual ...In reality, the best predictors that an angel will invest in your company are: You are related to the angel. You have raised from the angel before and made them money. You have worked for/with the ang

Yes. Treat the investor like a potential long-term business partner, not just a source of cash. An angel can affect your board, future fundraising, hiring, strategy, and reputation.

Here’s a practical way to vet them:

1. Verify that they are who they claim to be

Search their full name, investment entity, and company history independently.

Look for:

• LinkedIn and other professional profiles
• Companies they claim to have founded or invested in
• Press coverage and conference appearances
• SEC/state registration information if they present themselves as an investment professional
• Lawsuits, regulatory actions, bankruptcies, or other serious disputes

For U.S. investment professionals, the SEC's Investment Adviser Public Disclosure (IAPD) and FINRA's BrokerCheck can show registration, employment history and certain disciplinary information.

2. Ask for their actual portfolio

Don't settle for "I've invested in dozens of startups."

Ask for:

• 5–10 companies they've invested in
• How much they invested and when
• Whether they led or followed
• Whether they have board/observer rights
• What happened to those companies
• Whether they invested again in subsequent rounds

Then independently verify the companies and investment claims.

A failed investment isn't necessarily a red flag. What matters is whether the investor has a credible track record and behaves well when things go badly.

3. Do reference calls with their founders

This is probably the highest-value step.

Ask the investor for 2–3 founders you can contact. But don't stop there: find founders from their portfolio yourself and contact them through mutual connections.

Ask:

• "How involved are they after investing?"
• "How do they behave when the company misses targets?"
• "Do they respect management's decisions?"
• "Have they ever pressured you into something you disagreed with?"
• "How are they in board meetings?"
• "Did they help with recruiting, customers, or later fundraising?"
• "Would you take their money again?"
• "What's the worst thing about having them as an investor?"

That last question can be particularly revealing.

Recent founder guidance similarly recommends combining investor-provided references with independently sourced references, including at least one company where the relationship or outcome wasn't particularly successful.

4. Find out what happens when you disagree

This is arguably more important than their investment track record.

Ask yourself:

"What happens when I say no to this person?"

A good angel can disagree strongly while still respecting your authority as founder.

Be cautious if they:

• Expect special control despite being a minority investor
• Want unusual veto rights
• Frequently criticize founders they've backed
• Insist on approving ordinary operating decisions
• Become hostile when questioned
• Expect privileged information about other investors or employees

5. Read the term sheet for the relationship, not just valuation

A seemingly attractive valuation can conceal expensive control provisions.

Pay particular attention to:

• Board seats
• Voting rights
• Protective provisions/vetoes
• Founder vesting or clawbacks
• Information rights
• Pro-rata rights
• Liquidation preferences
• Redemption rights
• Drag-along provisions
• Restrictions on future fundraising
• Rights that give them influence disproportionate to their ownership

Have a startup attorney review this before signing.

6. Check their reputation beyond their references

Search combinations such as:

"Investor Name" lawsuit
"Investor Name" founder
"Investor Name" portfolio
"Investor Name" dispute
"Investor Name" startup
"Investor Name" "would invest again"

Also search former portfolio companies, not just current ones. A surprisingly useful question is:

"Who previously took this investor's money and later stopped working with them?"

7. Verify the money itself

Be particularly careful if the investor:

• Wants you to pay an upfront "processing" or "due diligence" fee
• Is vague about where the funds are coming from
• Keeps changing the funding entity
• Sends suspicious wire instructions
• Uses unusual urgency to get you to sign
• Wants personal financial information that isn't necessary for the transaction

An investor doing legitimate diligence on you is normal; you doing diligence on them is equally normal. Investor-due-diligence guidance specifically flags upfront fees, pressure tactics, unverifiable histories, and reluctance to provide references as warning signs.

My simple scoring system

Before taking the money, score them 1–5 on:

I'd be much more concerned about a 2/5 on integrity or behavior than a 2/5 on expertise. You can survive having an investor who isn't particularly helpful. A hostile investor with control rights can be much harder to escape.

The single best test: talk to a founder whose company struggled while this investor was involved. Ask what the investor did when things stopped going according to plan. That's where reputation becomes reality.

Checking the reputation of an angel investor before taking their money is critical. A bad investor can drain your time, micromanage your board, or toxicly brand your cap table for future rounds.

Here is a step-by-step framework to thoroughly vet an angel investor:

1. Ask for references

• Portfolio founders , request a list of 3 to 5 founders they have previously backed—specifically including at least one where things didn't go according to plan.
• Tough questions , ask those founders: How do they behave during a crisis? Do they add value beyond the check? Do they respect boundaries?

1. Conduct backchannel reference checks

• Mutual network , search your LinkedIn and local startup networks for founders who took money from this angel but weren't on their official reference list.
• Unfiltered feedback , cold-message these non-reference founders on LinkedIn or Twitter/X. Say: "I'm looking at a term sheet from [Investor] and want to know what it's really like working with them." Founders are usually fiercely honest with each other.

1. Scrutinize their track record and portfolio

• Data platforms , look up their investment history on Crunchbase or PitchBook to see how active they actually are and what companies they’ve backed.
• Follow-on participation , check if they historically participate in pro-rata rights (investing more in subsequent rounds) or if they tend to get diluted and disappear when times get tough.

1. Review their legal and ethical history

• Public records , do a quick Google and legal database search for their name alongside terms like lawsuit, fraud, SEC , or bankruptcy.
• Syndicate standing , if they lead a syndicate (like on AngelList), check their profile ratings, review their deal history, and see how transparent they are with their backers.

1. Test them with a low-stakes interaction

• Observe responsiveness , note how they communicate during the due diligence phase. Are they respectful of your time, or do they demand unreasonable data and flip out when you are busy shipping product?
• Value-add test , ask for an introduction to a specific customer or hire. See if they actually deliver or if their "network" turns out to be all smoke and mirrors.

1. Examine their funding source

• Dry powder vs. personal wealth , figure out if they are investing their own liquid capital or if they are investing out of a small, precarious vehicle or funds raised from third parties. True angels invest disposable income and are more patient.

If you'd like, tell me:

• What stage is your startup in?
• Is this angel investing individually or through a syndicate/group?

I can help you craft the exact questions to ask their references.

Checking an angel investor’s reputation is essentially reverse due diligence: you are evaluating a future long-term partner, not just accepting a wire transfer. A good investor should expect you to do this.

Here’s a practical process:

1. Verify their identity and background

Look for consistency across:

• LinkedIn history (companies, roles, dates)
• Prior startup investments
• Board roles
• Articles, interviews, podcasts, conference appearances
• Professional affiliations

Be cautious if they claim a major investing history but you cannot verify companies, founders, or outcomes.

2. Build their investment track record

Ask:

• “What companies have you invested in?”
• “When did you invest?”
• “What was your role besides writing a check?”
• “Can you introduce me to founders you’ve backed?”

Don’t only look at their wins. A strong signal is how they behaved with companies that struggled.

3. Talk to founders they invested in (including backchannels)

This is usually the highest-value step.

Ask founders:

• Did the investor do what they promised?
• Were they helpful between funding rounds?
• Did they respect founder decision-making?
• How did they behave during a crisis?
• Would you take their money again?

Try to speak with:

• One successful company
• One average outcome
• One company that failed or had conflict

Investors will naturally give you their happiest references, so independent outreach can reveal more.

4. Check their reputation among other investors

Talk to:

• Other angels
• Venture capitalists in your sector
• Startup lawyers
• Accelerators/incubators

Ask:

• “What is this person like to work with?”
• “Would you want them on your cap table?”
• “Any issues I should know about?”

5. Review their behavior during the deal

The fundraising process itself is a test.

Good signs:

• They answer questions openly
• They respect your timeline
• They are clear about expectations
• They introduce you to references willingly

Warning signs:

• Pressure to sign immediately
• Refusal to provide references
• Strange demands before investing
• Attempts to gain unusual control
• Anger when you ask normal diligence questions

6. Check public records

Depending on the investor and jurisdiction, look for:

• Lawsuits
• Regulatory actions
• Bankruptcy records
• Prior business disputes
• SEC/financial regulatory filings if applicable

For professional investors, regulatory and legal history can be especially relevant.

7. Understand what they want from the relationship

Ask directly:

• “What does a successful outcome look like to you?”
• “How involved do you like to be?”
• “How do you handle disagreements with founders?”
• “What happens if we need more capital and you can’t participate?”

The “right” angel is not necessarily the most famous one; it is someone whose incentives, communication style, and behavior match what your company needs.

A simple rule: before accepting money, find at least 3 founders who have worked with them and ask what happens when things get difficult. That answer is often more valuable than hearing about their biggest exits.

Checking the reputation of an angel investor before taking their money is critical. A bad investor can drain your time, ruin your cap table, or make your life miserable during a downturn.

Here is a structured, step-by-step approach to vetting an angel investor:

1. Ask for and check references
   • Founders currently backed: Request a list of 2 to 3 founders they have invested in recently. Ask them: How do they behave when things go wrong? Do they add value beyond the check? Are they responsive or overbearing?
   • Founders of failed/struggled startups: Try to find a company from their portfolio that didn't make it. Reach out to that founder to see how the investor handled a downturn or liquidation.
2. Search public databases and social footprint
   • Platform verification: Look up their profile on Crunchbase or PitchBook to verify their past investment history and track record.
   • Social and professional media: Review their activity on LinkedIn and X (formerly Twitter) to see what they post, how they interact with others, and whether their public persona aligns with your values.
3. Talk to the local startup ecosystem
   • Local accelerators and hubs: If the investor is local, speak with directors at regional accelerators, university incubators, or local entrepreneurship groups. They often know who the "value-add" angels are and who the toxic ones are.
   • Co-investors: Ask other investors who are participating in your round (or who have invested alongside this angel before) about their reputation.
4. Review their legal and negotiation track record
   • Term sheet behavior: Pay close attention to how they negotiate. Do they push for unreasonable control rights, excessive information rights, or unusual terms on a standard SAFE or convertible note?
   • Professionalism: Are they organized and respectful of timelines during the due diligence process, or are they chaotic and non-responsive?
5. Run a standard background check
   • Public records: For larger checks or if anything feels off, run a basic Google search for litigation, regulatory actions, or bankruptcies associated with their name or primary business.

Would you like me to share a list of specific questions you can ask their portfolio founders, or help you evaluate a particular red flag you've noticed?

Before accepting an angel investor, do two kinds of diligence: verify that they are who they say they are, and investigate what they are like to work with as a shareholder.

1. Verify their identity and professional history

Ask for their full legal name, investment entity name, website, and—if applicable—CRD/SEC number.

Then search:

• SEC Investment Adviser Public Disclosure (IAPD) — registration status, employment history, Form ADV, and disciplinary disclosures.
• FINRA BrokerCheck — useful if they're or were a broker/registered securities professional; it can show customer disputes and regulatory/disciplinary events.
• Your state securities regulator and SEC enforcement records for lawsuits, enforcement actions, or other problems.

Important: An ordinary angel investor may not appear in IAPD or BrokerCheck at all. Absence from those databases does not mean they're reputable; those systems primarily cover regulated investment professionals.

2. Ask for founder references

This is probably the most valuable step.

Ask the investor for 3–5 founders they've actually invested in, preferably:

• one successful investment,
• one mediocre/struggling company,
• and ideally one founder whose relationship with them ended badly.

Don't just ask, "Are they a good investor?" Ask:

• How did they behave when things went badly?
• Did they honor their commitments?
• Were they helpful after the check cleared?
• Did they demand unexpected information or control?
• How often did they contact you?
• Did they respect other investors and employees?
• Would you take their money again?
• What do you wish you'd known before accepting their investment?

That last question tends to produce unusually useful answers.

3. Investigate their behavior as a shareholder

You aren't merely evaluating their reputation—you are choosing someone who may have rights for years.

Look at their proposed term sheet and ask about:

• Board seat or observer rights
• Voting rights
• Information rights
• Pro-rata rights
• Protective provisions/vetoes
• Founder vesting or employment conditions
• Liquidation preferences
• Redemption rights
• Drag-along/tag-along provisions
• Any unusual side letters

A friendly investor with an aggressive term sheet is still an aggressive investor.

4. Search beyond official databases

Search their name in quotes along with terms like:

"[Name]" investor lawsuit
"[Name]" startup dispute
"[Name]" founder
"[Name]" portfolio
"[Name]" angel investor

Then check their claimed portfolio against the companies themselves. If they claim 20 investments, but several founders don't list them as investors—or the dates and roles don't line up—that's worth investigating.

Also verify their identity independently. The SEC specifically warns about impersonation of legitimate investment professionals and recommends confirming identities through official sources before sending money or personal information.

5. Look for these red flags

I'd slow down considerably if the investor:

• pressures you to accept immediately;
• refuses reasonable founder references;
• won't clearly explain where the investment money comes from;
• claims famous investments that can't be independently verified;
• asks for unusual personal payments or fees;
• wants excessive control for a relatively small investment;
• disparages every founder they've previously backed;
• insists that your lawyer isn't necessary;
• becomes hostile when you ask questions;
• asks you to misrepresent information to other investors, regulators, or lenders.

6. Have a startup lawyer review the deal

Don't limit diligence to "Is this person nice?" Have counsel look at the actual financing documents, particularly any unusual rights granted to the investor.

A useful rule is:

You are not just taking their money; you're adding them to your cap table.

I'd rather take slightly less favorable economics from an excellent long-term investor than slightly better economics from someone who can become a persistent governance problem.

If you give me the investor's name (and investment firm, if applicable), I can also show you exactly how I'd research that particular investor, including what public records and founder references to look for.