For Oxxo payment method there aren’t any test data available, but you can see how it works with the payment flow given below.
Oxxo Payment Flow
The customer enters his Email Address, Name and CURP/RFC/IFE.
Please note that for Mexico the Customer Social Security Number parameter consists of CURP/RFC/IFE. For more information about the CURP/RFC/IFE please click here.
The customer receives the printable voucher. In order to complete the payment, he needs to print the voucher and present it to any Oxxo store in his area to make the payment.
Upon completion of the payment flow the customer is redirected back to your ReturnURL.