Certification

Certification is a step of Go live. We make 6 Sandbox test payments and send their events to the webhook endpoint you choose, to check that it answers, verifies and handles a repeat. A pass counts for 90 days.

Certification catalog 27 Sep 2026

1. 1
   Before you start

   Add an enabled Sandbox webhook endpoint subscribed to payment_intent.succeeded. A Developer, Admin or Owner starts the run in Go live → Certification.

2. 2
   What your endpoint must do

   Verify each signature, store the event and answer 2xx within 10 seconds. Answer 2xx to a repeat of an event you already have, and use its event ID so you fulfill the order once.

3. 3
   What a pass means

   A run usually takes a few minutes. A pass completes the Certification step of Go live for 90 days. It does not open live payments on its own.

1. 1
   A customer pays

   The payment succeeds once, and your webhook endpoint is sent the payment_intent.succeeded event.Runs the Instant approval scenario.

2. 2
   A customer declines

   The customer turns down the prompt on their phone and nothing is charged.Runs the Customer declines the prompt scenario.

3. 3
   The provider is slow to answer

   The payment waits while we check with the provider, then succeeds once — never a second charge.Runs the Slow provider scenario.

4. 4
   A payment expires

   The approval window closes, we confirm nothing was charged, and the payment is marked expired.Runs the Customer doesn't respond scenario.

5. 5
   A refund

   A paid order is refunded once, and the refund is confirmed.Runs the Refund lifecycle scenario.

6. 6
   Your webhook receives and ignores a repeat

   Your endpoint receives the same event twice and answers 2xx both times. Use the event ID so you fulfill the order once.Runs the Webhook outage scenario.