The One Missing Document That Kills More Funding Rounds Than Bad Numbers Ever Do

 

Founders preparing for due diligence brace themselves for the hard conversations questionable financial projections, thin unit economics, an uncomfortable customer churn number. Almost nobody braces for the document that actually derails the most deals: a missing IP assignment from a contractor who left the company two years ago and was never asked to sign one.

The Document Nobody Thinks to Chase

IP assignment agreements exist to do one simple thing: formally transfer ownership of anything an employee or contractor builds into the company itself, rather than leaving it owned by the individual who wrote the code, designed the product, or built the model. In theory, every founder knows this matters. In practice, it's one of the most common legal issues that delays or kills a funding round precisely because it's invisible until someone goes looking for it.

Here's why it slips through so often: early-stage companies move fast, contractors come and go, and paperwork feels like the least urgent task when there's a product to ship. A founder can go years assuming ownership is settled simply because nobody's ever challenged it right up until an investor's legal team asks for proof.

Why This Specific Gap Is So Damaging

Bad financial projections can be explained, revised, or contextualised in a founder meeting. A missing IP assignment can't be talked through it's a binary problem. Either the company owns the IP or it doesn't, and if a former contractor never signed an assignment for work that ended up in the core product, that person may have a legitimate claim to part of what the company is selling to investors as its own.

This is exactly the kind of landmine due diligence is designed to surface. Investors aren't just checking that a business is profitable or growing they're confirming the company is legally clean enough that the equity being sold actually represents undisputed ownership of what it claims to.

Where This Fits in the Bigger Picture

IP assignment is one line in a much longer legal due diligence process that also covers the cap table (fully diluted, including every option, warrant, SAFE, and convertible note), the certificate of incorporation and its amendments, prior funding documents, and any pending or threatened litigation. All of it matters. But IP gaps stand out because they're uniquely hard to fix once they're found retroactively getting a former contractor to sign an assignment, especially one who left on bad terms or is no longer easy to reach, can take weeks and sometimes involves paying them to agree.

How Long Investors Actually Spend on This

The depth of legal review scales with the round. Pre-seed and angel checks tend to be relatively light, running one to two weeks. By Series A, legal due diligence stretches to four to six weeks of comprehensive review, and Series B and beyond can run six to eight weeks of institutional-grade scrutiny plenty of time for a gap like this to surface, and exactly the point in the process where a founder least wants to be renegotiating terms with a former employee.

The Fix Is Boring, Which Is Why It Works

There's no clever workaround here the fix is simply making sure every person who has ever contributed to the product has a signed IP assignment on file, ideally as part of onboarding rather than as an afterthought triggered by an investor's checklist. It's not glamorous work, but it's the difference between due diligence being a formality and due diligence becoming the reason a round stalls at the finish line.

I read this angle on Entrepreneur Plus UK, which highlighted how often overlooked paperwork not weak numbers turns out to be what actually holds up a funding round.