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Managing the invoice ID

When a transaction is created, the payment gateway generates and transmits an invoice number to PayPal in the Invoice ID field.

 

The field value must be unique to avoid the DUPLICATE_INVOICE_ID error.

To ensure field uniqueness, Monetico Retail generates the invoice number as follows:

  • If you are sending an order number, the Invoice ID field consists of the order number and the UUID (unique reference generated by the gateway) separated by a hyphen.
    Example:
    • Order ID: CX_12345
    • UUID : 90df7d7cd29f46bd8ff510b65f123579
    • Invoice ID : CX_12345-90df7d7cd29f46bd8ff510b65f123579

  • If you are not sending an order number, the Invoice ID field consists only the UUID (unique reference generated by the gateway).

    Example:

    • UUID : 90df7d7cd29f46bd8ff510b65f123580
    • Invoice ID : 90df7d7cd29f46bd8ff510b65f123580

 

We recommend that you provide an order number to make it easier to find your transactions in your PayPal Back Office.

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