How it works

Issue once. Check anywhere.

Authstamp keeps a record of every document and membership you issue. Anyone who receives one can check it against that record in seconds, without calling you.

Documents

Letters, certificates and licences.

  1. 1

    Issue

    The issuer

    • Upload the document and choose who it’s for.
    • Decide what a verifier is allowed to see.
    • Place the QR stamp and sign. Authstamp records it and gives it a 15-digit code.
  2. 2

    Share

    The holder

    • The holder gets an email and downloads the stamped document.
    • They share it by email, WhatsApp or print, like any other file.
    • Holders never pay, and never need to install anything.
  3. 3

    Verify

    Anyone who receives it

    • Scan the QR code or type the code at verify.authstamp.io.
    • Authstamp checks its own record, not the file, so a forwarded or compressed copy still works.
    • The result shows who issued it, for whom, and whether it still stands.

Membership

Proof of membership that expires on time.

Paper cards and certificates stay in wallets long after a member stops paying. With Authstamp, a check always shows today’s status.

  1. Add members

    Add members one by one or upload a spreadsheet. Each gets a member number.

  2. Set the terms

    Choose how long membership lasts and how many grace days follow expiry.

  3. Members carry proof

    Members receive their membership and can share it anywhere.

  4. Anyone checks status

    Enter the member number to see if the member is active today, not when a card was printed.

  5. Renew

    Renew a member and the check updates immediately. Lapsed members show as expired.

For verifiers

A clear answer, every time.

No guessing from logos or signatures. Every check ends in one of four results, each with the issuer’s name and the date.

  • Genuine

    Issued by Acme Bank to XYZ Ltd on 12 Oct 2026.

  • Revoked

    The issuer withdrew this document. Don’t rely on it.

  • Membership expired

    This member’s membership lapsed on 31 Aug 2026.

  • No record found

    Authstamp has no document with this code. Treat it as unverified.

For issuers

You decide what a verifier sees.

Confirming a document is real doesn’t mean showing everything in it. Set the rules once for each document.

  • How much to show

    Nothing but the result, a snippet, the first page, or the full document.

  • Who can open it

    Anyone with the code, an identified verifier, someone who knows the holder’s details, or only with the holder’s approval.

  • Holder name

    Show it in full, masked, or not at all.

  • Who checked

    Ask verifiers for their name or email, so the issuer knows who looked.

Why fakes fail

Forging the paper isn’t enough.

The record is the proof

The truth lives with Authstamp, not in the file. Editing the PDF changes nothing the verifier sees.

Copies can’t be borrowed

Each code belongs to one document and one holder. A real code on a different paper won’t match.

Withdrawals are instant

Revoke a document or let a membership lapse, and every future check shows it straight away.

Stamp your first document or membership.

Start free with 10 stamps a month. Or talk to us about on-premise, partnerships and investment.

Start issuing freeTalk to us