The useful starting point
Collecting a payment reference is different from verifying a payment.
Start with the right information
Choose the supported merchant flow and configure its credentials outside generated page code. Explain the total and recipient clearly before a customer pays.
Put it into practice
Check that a verified server callback updates the correct order only once. A customer-entered transaction number should remain unverified until checked.
Check before you share
Review pending and unsuccessful orders before asking a customer to try again. Keep the order reference so support can trace the same attempt.
Original guidance for this installation. Connected services, available formats and prices are shown in the workspace before you use them.