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Proof

Verify a Teewal report

Drop the PDF of a Teewal report, or paste its SHA-256 fingerprint: the page tells you whether Teewal issued it and whether it has been changed since.

  1. Drop the PDFor paste its SHA-256 fingerprint
  2. Computed on your devicethe file never leaves it
  3. Teewal answersgenuine, or changed since

The report to verify

Report (PDF)Choose the PDFor drop it hereNo file chosenThe file is not sent: its fingerprint is computed on your device, only the fingerprint goes to Teewal.

Teewal shows no name, address or amount here: for the content, ask the person who gave you the report.

Where to find the fingerprint and QR

At the bottom of every signed report, on the “Signature and evidence” page.

The answer contains

  • The job reference
  • The date of issue
  • The service and the town

Never

  • No name
  • No address
  • No amount
Have a verification code?Verify a signature with its code

How it works

Every report filed on Teewal is recorded with its SHA-256 fingerprint, a string of 64 characters computed from the file. The same file always gives the same fingerprint; a file changed by even one letter gives another.

The answer contains no name, address or amount: only the job reference, the date of issue, the type of service and the town. The link and QR code printed on the signed attestation open this page with the fingerprint already filled in.