Transaction Tokens and Duplication Detection

Learn about unique transaction tokens which assist with duplicate transaction checking and forced authentication checks.

It is possible that two transactions have very similar details, to the point where they are practically indistinguishable. For example, both transactions have the same:

  • card ID,
  • amounts,
  • currency,
  • merchant, and
  • card acceptor

In these cases, the transaction_tokenfield can be used as an additional measure to verify whether two transactions are in fact duplicates. If the transaction_token does not match, then the transactions are similar but are not duplicates.


Multiple transactions may have the transaction token XXXXXX. This token indicates a forced settlement and does not indicate that any two transactions with the token XXXXXX are duplicates. Please see Forced Settlements for more information.