PAYM-1b036c

A customer credit payment was rejected as invalid. Returned as HTTP 400. The message ends with the specific reason.

Reasons and fixes

• payerId is required — include a valid payerId on the payment.
• amountCents must be greater than 0 — send a positive amountCents.
• insufficient customer credit balance — the customer's available credit is less than the amount; confirm the balance covers it before charging.