AI can produce a plausible payment integration without proving that it handles an interrupted checkout. The merchant’s useful question is what evidence the developer can show before the integration moves from a test environment to real money. A successful demonstration of one purchase is only the beginning.
Define the payment state before the screen
Write down how the business distinguishes an order being created, a payment being authorized, capture succeeding, a refund being requested and funds being reconciled. These are separate events. An attractive success screen should not be the only evidence used to release goods. Ask the developer to identify the provider record that controls each state and the staff procedure for a disagreement.
Make repeated requests part of acceptance
A customer refreshes the checkout after a timeout. Staff retry the same order because the terminal appears stuck. The acceptance test should show what happens to the order and payment records in both cases. Stripe documents idempotency keys for safely retrying supported requests; the implementation must follow the actual provider’s behavior rather than assume every API works alike.
Keep a small test sheet: scenario, original order reference, provider reference, expected result, actual result and reviewer. Include a repeated request, a declined attempt followed by a corrected attempt, and a partial refund. The goal is to demonstrate one intended business action and explain any extra records, not merely count successful HTTP responses.
Check the event receiver separately
Stripe’s webhook guidance covers signature checks, duplicate events and events that do not arrive in the expected order. Ask for test evidence that an unverified event cannot mark an order paid, and that replaying a valid event does not release goods twice. Keep credentials and customer payment data out of prompts used to generate code.
Hand over an operating record
A release packet should identify the tested software version, provider API version, monitoring owner, rollback steps and unresolved scenarios. Record which tasks still require staff judgment. AI-generated code should go through the same independent engineering and security review as other payment code; a model’s explanation of its own output is not independent evidence.
A multi-location business can start with one controlled checkout flow before expansion. Continue with the Florida operating path and the AMS guide on keeping a retry from becoming a second charge. References checked October 17, 2026. These are acceptance questions to adapt with the business’s qualified developer and payment provider, not a complete security assessment.
Eric Kuvykin
Publisher and editorial director covering payments, fintech, merchant services, banking, AI, technology and operating strategy for small and medium-sized businesses.
