Electronic signatures, made in the EU
Send a document from your system. People sign on their phone or at your counter, and you get back a sealed PDF that proves who signed, when and how.
Free plan · no card needed · pay per completed signing
How it works
One case, one document, as many participants as it needs. TrustInk does the rest.
Your system or the portal creates a case, uploads the PDF and places the signature fields. One API call, or a few clicks.
Participants sign on their phone through a personal link, or in person at your counter. Nothing to install, no account to create.
The PDF comes back as PAdES B-LTA with a timestamp and the TrustInk seal, plus a sealed evidence summary. Your system hears about it by webhook.
Two ways to sign
Kiosk app coming
Hand your customer an iPad. The case opens on the kiosk, they sign with a finger or a pen, and the protocol is sealed before they leave the counter.
Available now
Each participant gets a personal link by email and signs in the browser on any phone or computer. Reminders go out on their own; a one-time code can confirm who signs.
For developers
A REST API, webhooks and live events. Create a case from your ERP, CRM or counter app and get the sealed PDF back without anyone leaving it.
Your backend gets a machine token from its client ID and secret, and calls the API with it. No user sessions to keep alive.
participant-signed, case-completed, case-failed, case-expired and case-cancelled, HMAC-signed and delivered again when your endpoint is down.
Follow a case live over a WebSocket, so the screen at your counter moves on the moment the customer signs.
Place signature fields in PDF points or page fractions, so every signature lands exactly where your template expects it.
$ curl -X POST https://api.trustink.io/cases \-H "Authorization: Bearer $TOKEN" \-H "Content-Type: application/json" \-d '{"title": "Service order 2026/0318","validUntil": "2026-10-31T23:59:59Z","participants": [{ "firstName": "Jana", "lastName": "Nováková","email": "jana@example.com","signatureFields": [{ "page": 1, "x": 0.55, "y": 0.05,"width": 0.35, "height": 0.08, "unit": "fraction" }] }],"callback": { "url": "https://erp.example.com/hooks", "authType": "NONE" }}'200 OK { "case": { "id": "49d4ae62-…", "status": "NEW" }, "upload": { "url": "https://…" } }Live events · WebSocket
POSTWebhook to your system
Trustink-Event: case-completedTrustink-Signature: t=1790175600,v1=5c3f… {"type": "case-completed","caseId": "49d4ae62-…","status": "DONE","data": { "orderId": 4711 },"signedDocument": { "url": "https://…" },"evidenceDocument": { "url": "https://…" }}Built to be trusted
Documents and evidence are stored and processed on AWS in Ireland.
PAdES B-LTA with RFC 3161 timestamps and revocation data inside, so the signature can be checked years from now.
A separate sealed PDF lists every participant’s steps and certificate.
Check a signed PDF against the TrustInk root and the EU trusted lists, no account needed.
Sign up, send your first PDF from the portal or the API, and hold a sealed, verifiable document in your hands the same day.
No card needed · pay per completed signing · hosted in the EU