What is a certificate of completion in e-signing?

A certificate of completion is a separate document, generated automatically when everyone has signed, that summarises exactly how a document was signed: who the parties were, when each of them signed, and the technical details that back it all up. Think of it as the receipt for the agreement — proof of the process, sitting alongside the agreement itself.

If the signed document is the what, the certificate of completion is the who, when and how.

What a certificate of completion contains

The exact contents vary between providers, but a solid certificate of completion sets out:

• The parties — the name and email address of each signer.
• Timestamps — when the document was sent, opened, viewed and signed by each person.
• A document fingerprint — a unique identifier tied to the exact contents of the finished file.
• Completion status — confirmation that every required party signed and the document was sealed.

With Signet, this certificate is produced for every completed document, on every plan including Free. It is not an upsell or an enterprise extra. It is simply part of what a signed document should come with.

How it differs from the signed document

This is the part people miss. The signed document and the certificate of completion do two different jobs.

The signed document contains the agreement — the clauses, the price, the scope, the signatures on the page. The certificate of completion contains the evidence about that signing event. One is the deal. The other is the proof that the deal was executed properly.

The contract tells you what was agreed. The certificate of completion tells you it was really them, really then, and that nothing has changed since.

You could hand someone a signed PDF and they would have to take the signatures on trust. Hand them the certificate as well and they can see the whole picture: the addresses involved, the timeline, and a fingerprint that ties it all to the specific file in front of them.

Why it matters for enforceability and audits

When a signature is challenged, the questions are predictable. Was it really that person? Did they actually see it before signing? Has the document been changed since? A certificate of completion answers all three in one place.

For anyone facing an audit — financial, legal, regulatory — this is invaluable. Instead of digging through inboxes to reconstruct who signed what and when, you have a single, self-contained record you can produce on demand. It turns "I'm fairly sure this is right" into "here is the certificate."

It also supports enforceability. E-signatures are recognised under the EU eIDAS regulation and the US ESIGN Act and UETA, but recognition is not the same as evidence. If you ever needed to rely on a signed document, the certificate of completion is what demonstrates the signing was sound.

Proof you can check, not just keep

A certificate is only worth having if it can be trusted, which is why it works hand in hand with independent verification. The document fingerprint on the certificate lets anyone confirm the finished file has not been altered since it was sealed.

You can see how that check works on our verification page, and read about how documents are encrypted and stored on our security page. Both matter, because a certificate you cannot verify is just another piece of paper.

The takeaway is simple. A signature closes the deal. A certificate of completion proves it — cleanly, automatically, and in a form anyone can check.

Signet is in private beta, request early access and send your first sealed agreement free.