Agree on commercial requirements.
The client and qualified advisers approve pricing, NZD or other currency display, tax inputs, invoice fields, customer terms and refunds.
Payment project planning
Plan the customer message and staff record as well as checkout.
A useful payment scope includes what happens when the transaction is incomplete.
Review actual provider options.
Confirm supported accounts and interfaces before choosing the route. Separate customer display from settlement and accounting records.
Define incomplete results.
Distinguish pending, declined, duplicate, cancelled and refunded states. Name the person following up when provider and application records disagree.
Verify in isolation.
Use vendor test environments without real charges or customer messages. Check receipts, repeated events and reconciliation against agreed records.
Find official tax research links or describe the payment task.