Verification

Check a receipt

Received a Mandaton receipt from a counterparty? Paste its identifier. No account, no login — a receipt only its issuer can check is not evidence.

Receipt identifier

Verify

What the check proves

• Integrity. The hash is recomputed from the receipt body via RFC 8785 canonicalisation. If one byte of the content changed, the hashes differ.
• Inclusion. The receipt is a leaf in an append-only Merkle tree. The inclusion path proves it sat in the tree at the size the tree head states.
• Tree head signature. The head is signed by a key in a European key management service, so the log cannot be quietly rewritten.
• Sealing status. Whether a qualified electronic seal has been added — that step is the next milestone, and the page tells you the truth about it.

You do not have to take the page's word for it: every input the check uses is in the JSON at the same URL, and the algorithms are published standards. Recompute it in your own code.