Offer and display
Approve TRY presentation, decimal and rounding behavior, recurring terms, fees, tax display, cancellation wording, Turkish content, accessibility, and the order of consent steps.
Commerce bridge / transaction state
Make the TRY journey readable from price to reconciliation.
Local methods, FAST, cards, or wallets may be research questions, not promises. The client and provider choose a feasible route; engineering makes the approved transaction states observable, recoverable, and supportable.
Merchant and provider
Confirm entity eligibility, production account, contract, settlement destination, available methods, authentication, credentials, webhooks, prohibited uses, and support ownership directly with providers.
Failure states
Design for declines, abandoned authentication, timeouts, duplicate notifications, delayed confirmation, mismatched totals, provider downtime, and the customer's honest next step.
Refunds and disputes
Name the person who verifies requests, authorizes refunds, manages evidence, handles disputes or chargebacks, communicates status, and closes internal records.
Books and invoices
Join order IDs to provider references, settlement reports, exceptions, invoices, tax records, and retention. An accountant or tax adviser owns the treatment.
Controlled launch
Use test and limited production cases, accessible error checks, log review, reconciliation proof, monitoring, rollback criteria, and a human go-or-stop decision.
The Central Bank of the Republic of Türkiye payment-systems material and Revenue Administration are official research stops. Provider, banking, accounting, tax, and legal owners must confirm the actual route.
Payment checkpoint
Bring the success path and the uncertain state.
The hardest engineering question is often not “did it fail?” but “what should the customer and staff do while the answer is unknown?”