Document integrity
Verify a Cybex document
Every document Cybex Sign produces has a SHA-256 fingerprint recorded against it. Check a file here to see whether it is byte-for-byte identical to the one Cybex recorded. Any change to the file, however small, produces a different fingerprint.
Drop the document here
or
Your file is not uploaded. It is fingerprinted in your browser and only the 64-character SHA-256 value is sent to Cybex.
Narrows the check. If the fingerprint belongs to a different envelope, you will be told so.
What this does and does not show
A match shows that the file you have is exactly the file Cybex Sign produced for that envelope — not a re-save, not a re-print, not an edited copy.
It does not disclose the contents of any agreement, the parties to it, or anything else about the transaction. Holding a file proves you hold the file; it is not a reason to be told everything Cybex knows about it.
It also does not determine the legal effect or enforceability of the underlying agreement. That is a separate question, for the parties and their advisors.