> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sumvin.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Accept a Stamped Mandate at checkout

> Quickstart for accepting a Sumvin Stamped Mandate at an x402-backed checkout.

This quickstart will walk a **verifier** through accepting a Stamped Mandate at checkout, from request arrival through to settlement confirmation.

<Snippet file="product-term-disambiguation.mdx" />

A <Tooltip headline="Stamped Mandate" tip="A signed authorisation a user grants for specific scoped actions — delivered on the wire as a PINT." cta="Glossary →" href="/glossary">Stamped Mandate</Tooltip> is delivered over the API as a `PINT` (header `x-sumvin-pint-token`) — extract and verify it from the incoming request as in the [standard-tier quickstart](/merchant/quickstarts/verify-standard-pint), then apply the scope and tier checks below before confirming payment.

<Info>
  Accepting a Stamped Mandate at an x402 checkout is an early-access flow. Verifiers who plug in now help shape the sandbox spec and go live the moment the rail opens up — contact your account manager to join the pilot cohort.
</Info>

## What this page will cover

* Prerequisites (x402-capable endpoint, verifier credentials)
* Receive the incoming request and extract the Stamped Mandate
* Validate scope, tier, and signature
* Confirm the payment and respond

## Related

* [Verifier overview](/merchant/overview)
* [Payment request links](/products/payment-links/payment-request-links)
* [Verify PINT signature](/merchant/verify-pint-signature)