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Verify a signed document

Anyone can check a signed PDF with no account. What the three answers mean, and what the page never reveals.

Updated 2 minutes to read

Anyone holding a signed PDF can check it, with no account and no sign-in. Open our verify page, upload the file, and we tell you whether EsignCenter produced it. It is there so a bank, a landlord or a clerk can confirm a document is genuine without being given access to anything else.

How to check a document

  1. Open the verify page.
  2. Choose the PDF, exactly as you received it. Do not open and re-save it first — that changes the file.
  3. Read the answer. It appears immediately.

The three answers

  • Verified. Our seal is on the file and its bytes match a document we recorded at signing time. The page shows the day the signing finished and how many people had signed by then.
  • Not on record. The file carries our seal, but its bytes match nothing we recorded — usually because it was changed after signing. Even one added byte lands here.
  • Not verified. The file carries no EsignCenter seal at all. It was not completed here, or it was altered badly enough to break the seal.

What the page will not tell you

The answer is deliberately narrow. It never shows who signed — no names, email addresses or phone numbers — nothing from the contents of the document, no time of day, and never whether a particular person signed anything. It cannot be used to look people up, and it reveals nothing an attacker could not already read by opening the PDF themselves.

What is actually being checked

Every PDF EsignCenter completes is sealed with a digital signature and carries a trusted timestamp from a public timestamp authority. At the same moment we store a SHA-256 fingerprint of the exact file, the completion time and the signer count. Verifying does two things: it confirms the seal is ours, and it compares the fingerprint of the file you uploaded with the one we recorded. That is why any later edit shows up.

Limits and small print

One PDF per check, up to 25 MB, and the file has to really be a PDF. There is a fair-use speed limit of 10 checks a minute per visitor; go past it and the page asks you to wait a moment.

A handful of very old files — combined copies and audit trails produced before this page existed — carry our seal but no record, so they answer "not on record". Everything signed since verifies normally.

The evidence behind each of these claims is set out on our trust page. See also Your data, exports and deletion.

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