4 MIN READ / SOURCE CHECKED
Authorization, capture, void, and refund are different state changes
Map the states before writing the happy path.
READING PATH / Developers & product teams
Build for the payment that goes wrong
Separate payment states, repeat requests safely, and handle delayed or duplicated events without charging twice.
5 GUIDES / ABOUT 19 MINUTES
LEARN THE STATES.
CHECK THE ASSUMPTIONS.
KEEP THE EVIDENCE.
CHECK THE ASSUMPTIONS.
KEEP THE EVIDENCE.
Use the sequence as a reading plan, not a guarantee that an account, product or implementation is safe. The checkboxes record only what you mark on this page.
All reading paths →3 MIN READ / SOURCE CHECKED
Retry a payment API call without creating a second operation
Preserve one business operation across retries.
4 MIN READ / SOURCE CHECKED
Treat payment webhooks as signed, repeated, out-of-order messages
Verify, deduplicate and reconcile events.
4 MIN READ / SOURCE CHECKED
Hosted checkout reduces PCI scope; it does not erase the merchant boundary
Know which security responsibilities remain yours.
4 MIN READ / SOURCE CHECKED
Recover recurring payments without surprising the customer
Handle failures without misleading customers.
0 of 5 reading steps marked. Progress stays on this page only; it is not a certification.