Mandatory parameter.

Consists of 6 numeric characters and must be unique for each transaction for a given shop on a given day.

The merchant must guarantee that it is unique within that day. It must be between 000000 and 899999.

The interval between 900000 and 999999 is used for refunds and operations performed from the Back Office.

Format n6
Error code 03

Frequent errors:

The form will be rejected if:
  • The transmitted value is shorter than 6 digits.
  • The value is null.
  • The field is absent.
  • An identical transaction number has already been sent the same day.
    When the buyer clicks on "Cancel and return to shop", the transaction number will have to be different on the next attempt and the previous one will be considered as already used.

    If it is the same, the message "The transaction has been canceled" will appear.

Category Transaction details.