What it means
Order and payment information
Checkout brings together items, customer details, totals and payment choices. It can be hosted by a provider, embedded into a site or built from components. The integration determines which system creates and tracks the payment.
A completion screen is not enough
A browser redirect can be interrupted or manipulated, and some payment methods finish asynchronously. The business needs a documented server-side status flow and an order-state policy. It should handle expiration, payment failures and later adjustments without relying only on what the customer’s browser displays.
Related concepts
In practice
A concrete example
A store shows an order-received page after redirect but waits for verified payment state before releasing a digital download.
Technical notes & boundaries
A success URL or HTTP success response is not independent proof of payment, authenticity, durable storage or completed fulfilment.
Go to the source.
Original references used for this definition. Product details and standards can change.
