Check a verification certificate

A CECO PDF verification certificate records what was corrected in one document, and what was measured to have stayed exactly as it was. Enter its id, or upload the certificate PDF, to see whether it is genuine and unaltered.

What a certificate shows

That the corrected document with the SHA-256 it names was produced by CECO PDF from the uploaded document it names, and that each correction changed pixels only inside the region it declared.

It is not a notarisation, a legal attestation or an invoice, and it does not say the corrected words are true.

Its statement is signed with Ed25519. The public key is published at /.well-known/ceco-certificate-key, so the signature can be checked without this page.

Where a certificate comes from

A certificate is issued on the Business plan, for a document whose corrections have all been verified. How a scanned PDF is corrected and checked describes that check, and the pricing page what each plan includes.