Application Acknowledgments

Application acknowledgments are responses sent from the destination system back to the originating system, acknowledging that the transaction has been successfully or unsuccessfully completed.

The application advice (Transaction Set 824) is a generic application acknowledgment that can be used in response to any X12 transaction. However, it has to be set up as a response transaction; only TA1 and Transaction Set 997 transactions are sent out automatically.

Other types of responses from the destination system to the originating system, which can also be considered application acknowledgments, are responses to query transactions, for example, the Eligibility Response (Transaction Set 271) is a response to the Eligibility Inquiry (Transaction Set 270).