A term sheet is not a binding contract, but it is treated as one in every negotiation that follows it. Investors size their offer around it. Lawyers draft the definitive agreement from it. Founders make hiring and spending decisions based on the numbers in it. And when a deal later falls apart, the term sheet is often the first document both sides pull out, and the first document both sides disagree about.
Where the ambiguity actually comes from
Early deal paper rarely moves in one clean file. A term sheet gets drafted, sent by email, marked up in a redline, discussed on a call where a number changes verbally, then re-sent with the change applied by only one party. By the time a dispute surfaces, weeks or months later, there can be three or four versions sitting in different inboxes, none of them labeled as final, and no shared record of which one both sides actually agreed to.
Email metadata does not resolve this cleanly. A sent timestamp shows when a message left a server, not whether the attachment inside it was the agreed version or an earlier draft still being negotiated. File properties on a Word document can be edited after the fact. A PDF's creation date reflects when the file was exported, not when the terms in it were settled. None of these are fabricated evidence in the criminal sense, but none of them are proof either, and in a dispute a document that could have been altered carries a different weight than a document that provably was not.
What "your word against theirs" actually costs
When a dispute over a term sheet or letter of intent reaches a lawyer, the first question is rarely about the substance of the deal. It is about which version of the document is authoritative and whether either party can prove it. That question alone can add weeks of discovery, forensic review of email headers, and depositions about who sent what to whom. None of that work touches the actual disagreement, valuation, exclusivity, board seats, whatever it is. It is entirely spent establishing a fact that should not have needed establishing: what did the document say, and when.
For deal counsel and finance teams running multiple negotiations at once, this is a recurring cost, not a one-off. Every LOI, every term sheet, every side letter carries the same latent exposure the moment it leaves a single inbox.
A dated seal removes the argument, not just the risk
The fix is not better email hygiene. It is a record of the document that neither party controls and that cannot be quietly edited after the fact. Swiss Trust Layer applies a qualified electronic seal to the exact file at the exact moment it is finalized, backed by a Swisscom-issued qualified timestamp. That seal does not depend on either party's mail server, their local file system, or their memory of a call. It is an independent, verifiable record that this specific document, byte for byte, existed at this specific time.
Anyone can verify a sealed document without logging into anything. There is no "trust our platform" step in the middle. The verification checks the cryptographic seal itself, the same way a court or opposing counsel would check any other independently issued proof.
This does not replace the definitive agreement your lawyers draft afterward. It closes the gap that sits between the handshake moment and the signed contract, the period where the most disputes over "what did we actually agree to" originate.
Where this fits in a real negotiation
| Moment | What typically happens | What a sealed version adds |
|---|---|---|
| Term sheet drafted | Sent by email, no independent timestamp | Sealed at the moment both sides sign off, creating a fixed reference point |
| Redline exchanged | New version replaces the old one in inboxes, prior version usually still exists somewhere | Each finalized version can be sealed separately, so the sequence is provable, not just claimed |
| Verbal amendment on a call | One party updates the file, the other may not have the same copy | The updated file is sealed the moment it is agreed, closing the ambiguity window |
| Deal falls through | Each side may hold a different "final" version | The sealed copy is the independently verifiable record, checkable by either side or a third party |
Who this matters most for
This is a document-integrity problem, not a copyright question, and it shows up hardest for the people who move fastest through early deal paper: in-house counsel managing several term sheets in parallel, M&A associates coordinating redlines across time zones, venture and growth investors who issue non-binding terms as a matter of routine, and founders negotiating without dedicated legal support who have the least room to absorb a dispute over what a document actually said.
None of this requires a change in how a deal gets negotiated. It requires one additional step at the moment each version is finalized: seal it, so that the record of what was agreed and when does not depend on anyone's inbox.
