What an attestation is
An attestation is a signed statement bound to a sealed timeline: who (a registered account), what (picked_up, received_ok, received_damaged, handover, or custom with a note), when, and about which shipment — signed with Ed25519 and stored alongside the hash-chain seal of the moment it was made.
Why it matters
Carrier events say what the carrier's systems saw. Attestations add the parties' own voice — the warehouse confirming pickup, the recipient confirming intact delivery — in a form that cannot be backdated or edited later without breaking verification. Together they form a tamper-evident chain of custody.
Making one
On a saved shipment's card, choose Attest, pick the type, optionally add a note. The attestation appears on the shipment's verification surface; the signature covers the statement and its binding to the sealed history.
Verifying one
Anyone with the shipment's verification page (or an exported passport) can check: the signature verifies against the attester's public key, and the bound timeline still verifies against its seals. A forged or altered attestation fails cryptographically — no judgment call involved.
Enterprise patterns
- Multi-party: sender attests pickup, recipient attests delivery condition — both bound to the same chain.
- Disputes: export the passport with attestations; the package is self-contained evidence.