Due Diligence Red Flags: 12 Issues Investors Find in Startup Data Rooms

Most due diligence problems are not secrets. They sit in plain sight in the data room: a consent that was never signed, a cap table that does not add up, a contractor who never assigned their code. Investors' counsel finds them because they read every document and check how the documents relate.

Here are twelve red flags that commonly come up, grouped by area, with what to do about each. This is general information, so work through fixes with your lawyer.

Equity and cap table

1. Cap table does not match the documents

The most common issue. Shares or options appear on the cap table without a signed agreement or board approval behind them, or documents exist that are not reflected on the cap table.

Fix: reconcile every line of your cap table to its supporting documents.

2. Equity issued without proper board approval

Option grants or stock issuances that were never approved by the board, or approved after the fact without proper ratification.

Fix: work with counsel on ratification before diligence.

3. Missing 83(b) elections

Founders or early employees who received restricted stock without filing an 83(b) election can face tax consequences, and investors will ask.

Fix: confirm you have copies with proof of filing. If one is missing, talk to your lawyer.

4. SAFEs and notes not reflected correctly

SAFEs and convertible notes left off the fully diluted cap table, or modeled incorrectly, change the economics investors think they are getting.

Fix: include every instrument and model conversion carefully.

5. Undocumented promises of equity

Advisors, early employees, or friends promised equity informally, without documentation or board approval.

Fix: document and approve properly, or resolve the promise in writing.

Intellectual property

6. Missing IP assignments

A founder, employee, or contractor who contributed to the product without signing an IP assignment. This can raise questions about whether the company owns its core technology.

Fix: obtain signed assignments now, especially from anyone who has left or may leave.

7. Pre-formation IP

Code or inventions created by founders before the company existed, never formally assigned to the company.

Fix: a founder IP assignment covering pre-formation work.

Corporate and governance

8. Missing or unsigned consents

Board or stockholder consents that are referenced but cannot be found, or were never signed.

Fix: locate them or work with counsel to address the gap.

9. Inconsistent names and entities

The same person or entity listed under different name variations across documents, or contracts signed under the wrong entity name.

Fix: identify the variations and confirm each refers to the right party.

10. Not in good standing

Missed franchise tax payments or annual reports can put the company out of good standing.

Fix: check your status and file what is overdue.

Commercial and financial

11. Problematic contract terms

Customer or partner contracts with exclusivity, change-of-control, or most-favored-nation clauses that could limit the business or be triggered by a future transaction.

Fix: know which of your contracts contain these terms and be ready to explain them.

12. Deck numbers that do not match the financials

Revenue, growth, or customer counts in the deck that the financials do not support. Nothing damages credibility faster.

Fix: reconcile every number in the deck to its source before you share it.

How to find red flags before investors do

The pattern behind most of these issues is the same: each document looks fine on its own, but the documents disagree with each other. Finding that requires reading everything and connecting it, which is exactly what investors' counsel does.

DocChief does that work first:

• Reconstructs your equity and governance history on a timeline
• Maps stakeholders, ownership, control, and contractual rights
• Detects name variations across documents
• Flags missing evidence, inconsistencies, governance gaps, and potential liabilities
• Distinguishes potential deal-breakers from issues that can be clarified or resolved

The Fundraising Readiness Health Check shows what needs attention before diligence starts. DocChief does not replace your lawyer. It gives your lawyer specific, evidence-backed issues to resolve instead of a folder to search.

Frequently asked questions

What are the biggest red flags in startup due diligence?

Cap table discrepancies, unapproved equity, missing IP assignments, and numbers that do not reconcile.

Can a red flag kill a deal?

Serious ones can, especially IP ownership problems or significant equity issues. Most red flags cause delays or added closing conditions rather than ending a deal, particularly when founders disclose them early.

Should I disclose problems before investors find them?

Generally yes. Disclosing a known issue with a plan to fix it builds trust. Investors finding it themselves does the opposite.

How early should I look for red flags?

Before you start pitching, so you have time to fix them.

Find your red flags first

Start free with DocChief and see what investors' counsel would find.

Related reading: Due Diligence Readiness | What Belongs in a Tech Startup Data Room