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Things to Remember

  1. Upon receiving a response, merchants must validate the signature at their end. Refer to the signature generation section in the documentation for comprehensive instructions on validation procedures.

  2. Each store can be associated with only one Virtual Payment Address (VPA). Similarly, once a VPA is associated with a store, it cannot be added to another store. Ensure adherence to this unique association rule during integration.

  3. Upon receiving the status through Instant Payment Notification (IPN), merchants must promptly relay it to the end store to confirm transaction status. The response from the server to the Point of Sale (POS) system should include both the Merchant Order ID and Amazon Order ID for thorough transaction review by end merchants.

  4. Merchants' servers should maintain a Time Acceptance Threshold (TAT) of 3 minutes and 30 seconds for processing IPN responses. In cases of delayed responses, utilize the provided refund APIs to auto-refund transactions promptly.

Note

Deviations from the implementation guidelines mentioned above should be discussed with your integration Point of Contact (POC) for clarification and guidance.