A due diligence process rarely stalls because of the deal terms. It stalls because a signed employment contract cannot be found, an IP assignment was never actually executed, the cap table on paper does not match the cap table in the company's own records, or a document genuinely exists somewhere but nobody can locate it before the buyer's patience runs out. This article covers the actual, recurring causes of delay, and the quieter cost that comes with them: a slow, scattered response makes a buyer or investor nervous about the business itself, not just about the paperwork. It is the consequence piece to our companion guide on answering a request list without losing weeks, and it assumes you already know what a due diligence request list should contain and how to draft one with AI, assembled from vetted clauses rather than invented wording.
> Quick answer: The recurring causes of diligence delay are missing signed documents, particularly employment contracts and IP assignments, unassigned or unclear intellectual property ownership, a cap table that does not match the company's own share register, and documents that technically exist but cannot be found quickly because nobody organised them for this purpose. None of these are deal-breakers on their own, but each one adds days or weeks, and a pattern of them makes a buyer or investor start doubting how well the business is actually run, which is a more serious cost than the delay itself.
Missing signed documents, especially the ones nobody thought would matter
The single most common cause of delay is a document that should exist and does not, at least not in a form anyone can actually produce. Employment contracts are the classic example. Founders hire quickly in the early days, sometimes on a handshake and an offer email, and never circle back to get a proper written contract signed once the company grows up. An advisor is promised equity in a conversation that never gets written down. A contractor starts work before anything is signed because the relationship needed to move fast. Every one of these gaps surfaces the moment a request list asks for "all employment and consultancy agreements," and producing nothing, or producing an unsigned draft, is a red flag a buyer cannot simply wave through.
The fix is not complicated, but it has to happen before diligence starts, not during it. Every person working for the company, whether employed, contracted, or advising, should have a signed agreement on file from day one, covered in more depth in our guides on when to issue an employee's written contract and how to take on a contractor properly before day one. Retrofitting a signature during an active diligence process, with a buyer watching the timestamp, is possible but it is a visibly worse position than simply having it done already.
Unassigned intellectual property
Closely related, and arguably more damaging, is intellectual property that was never formally assigned to the company. If a contractor, co-founder, or early technical hire built something core to the product before a proper IP assignment was signed, the company's ownership of that work is genuinely in question, not just administratively messy. Buyers and investors take this seriously because it is not a paperwork inconvenience, it is a question of what they are actually acquiring. Our companion article on what happens if you never got an IP assignment signed covers the substance of this risk in full; here the point is narrower: a missing IP assignment is one of the single most common items to stall a deal at the eleventh hour, because fixing it retroactively, getting a former contractor who has since left on good or bad terms to sign something now, can be genuinely difficult and sometimes requires a negotiated payment to get the signature at all.
A cap table that does not match the company's own records
Investors and buyers check the cap table against the company's own statutory registers, and any mismatch, an option grant that was verbally agreed but never formally issued, a co-founder's shares that were meant to vest but never had a proper agreement, an advisor grant sitting in a spreadsheet but not reflected anywhere official, creates exactly the kind of question that stops a deal cold while it gets resolved. Our companion piece on how to split equity between co-founders and the drafting guidance behind a proper founder agreement both exist precisely because the cap table has to be backed by real, signed documents, not an internal spreadsheet everyone trusts informally. A clean cap table that matches the paperwork behind it is one of the fastest things to verify in diligence. A messy one is one of the slowest, because untangling it usually means reconstructing a history nobody wrote down properly the first time.
Documents that exist but cannot be found
The least dramatic cause of delay is also one of the most common: the document is real, it was signed, and nobody can locate it quickly. It sits in an old email thread, on a former employee's laptop, in a folder named for a project that got renamed two years ago. A request list response built on searching through scattered files as each item comes up, rather than from documents already centralised somewhere organised, adds days to every section, not because the underlying paperwork has a problem but because retrieval itself is the bottleneck. This is precisely the gap a room built ahead of a raise or sale closes, with the access-level security to match, by keeping signed agreements, whether drafted and signed on the platform or uploaded from elsewhere, in one place with names and dates that make sense, rather than scattered across whoever happened to handle each document originally.
The cost nobody mentions: credibility, not just time
Every one of the causes above costs days or weeks directly, but there is a second, quieter cost that matters just as much. A buyer or investor working through a slow, scattered, or repeatedly incomplete response does not just lose patience with the process. They start to wonder, reasonably, whether the same disorganisation runs through the rest of the business, its contracts, its compliance, its financial controls. A single missing document is a fixable gap. A pattern of missing documents, slow responses, and things that "should be somewhere" is a signal about how the company is actually run, and that signal can affect valuation, terms, or whether the deal proceeds at all, in a way that is much harder to fix than producing one more signed contract.
This is precisely why the fix belongs well before a deal is live. Keeping every signed agreement centralised as it is created, with reminders ahead of any renewal or expiry date rather than discovering a lapsed term mid-negotiation, is covered in our guide on keeping every contract in one place. By the time a request list actually arrives, the goal is for the answer to already exist, not to be assembled under time pressure while a buyer watches the clock.
What actually helps once the process is live
If a gap surfaces mid-process despite everything, the fastest recovery is honesty and a plan, not silence. Flag the missing item plainly, with a realistic date for resolving it, rather than hoping nobody notices, a point our companion article on answering the request list without losing weeks covers from the response side. Where a document genuinely needs signing urgently to close a gap, e-signature with an audit certificate recording the signer's IP, intent to sign, timestamps and a SHA-256 fingerprint at least produces something with a clear, defensible paper trail from that point forward, though electronic signatures are admissible for most commercial documents in England and Wales, with exceptions including deeds, wills, land transfers and lasting powers of attorney. This is general information, not legal advice. It does not erase the fact that the document should have existed earlier, but it stops the gap from getting worse while the deal is live.
This article assumes an England and Wales company and the diligence conventions that go with one. The specific documents named above, employment contracts, IP assignments, share registers, are shaped by England and Wales law, but the underlying pattern, missing paperwork, unclear ownership, and poor retrieval, causes exactly the same delay in a diligence process anywhere.
Frequently asked questions
What is the most common reason due diligence takes longer than expected?
Missing or unsigned documents, particularly employment contracts and intellectual property assignments, are the most frequent cause. These gaps only surface once a request list specifically asks for them, by which point fixing them retroactively is slower and more visible than having them in place from the start.
Can a missing IP assignment actually kill a deal?
It can, or at minimum seriously delay and reprice one, particularly where the unassigned work is core to the product. Buyers are acquiring ownership, not just a working product, and unclear IP ownership is a substantive risk, not an administrative footnote.
Why does a messy cap table slow diligence down?
Because investors and buyers check the cap table against the company's own statutory registers and signed agreements, and any mismatch, an informal grant, an unvested promise, a spreadsheet nobody formalised, requires reconstruction before anyone can be confident about who owns what.
Does it matter if a document exists but takes time to find?
Yes. Retrieval speed is itself part of what a buyer or investor is watching. A slow response caused purely by disorganised filing, rather than any genuine gap in the paperwork, still reads as a signal about how the business is run and can cost time and credibility either way.
What is the actual cost of a slow diligence response, beyond lost time?
Reduced credibility. A pattern of missing or slow-to-produce documents makes a buyer or investor question whether the rest of the business is run with the same looseness, which can affect valuation, terms, or whether the deal proceeds, well beyond the direct cost of the delay itself.
Keep the paperwork ready before diligence starts
Centralise every signed agreement, drafted or uploaded from elsewhere, in one place with reminders ahead of renewal or expiry, so a request list finds an answer that already exists rather than one built under pressure. The free tier gives three rooms and twenty-five active links, forever, with no card required; the AI drafter and e-signature start on Pro at £19 a month. Start for free and close the gaps before a buyer finds them.
This article is general information, not legal advice. Whether a specific gap is fixable, and how, depends on the facts of your situation and is worth discussing with your advisers before a live process is underway.
Sources
- Copyright first ownership, the statutory position behind why an unassigned IP contribution remains with its creator absent a valid assignment: Copyright, Designs and Patents Act 1988, s.11, https://www.legislation.gov.uk/ukpga/1988/48/section/11
- Electronic signatures, validity and exceptions including deeds, wills, land transfers and lasting powers of attorney: Law Commission, Electronic execution of documents (2019), https://lawcom.gov.uk/project/electronic-execution-of-documents/ ; HM Land Registry Practice Guide 82, https://www.gov.uk/government/publications/electronic-signatures-accepted-by-hm-land-registry-pg82