Duplicate Transaction Detection

In order to help you avoid transaction errors, Worldpay performs duplicate transaction checking for both Online and Batch transaction submissions. While we use a robust duplicate checking methodology, we cannot guarantee our system will catch all duplicates and bear no responsibility for correcting the impact of erroneously submitted transactions. This section discusses the different checking methodologies used depending upon the type of submission.

For tokenized transactions, the token is used in place of the card numbers by the Duplicate Transaction Detection process. For PayPal transactions a combination of the PayPal Id + the (consumer’s) email is used by the Duplicate Transaction Detection process. For transactions submitted using other formats (e.g., PTI, Nabanco, etc.), the logic used to detect duplicates for these supported, but foreign APIs, is less robust and may miss duplicates in certain scenarios. Worldpay recommends, for better dupe checking, convert to the cnpAPI format, as soon as possible.