Overview of Single-Message Processing

There are important differences between single-message processing and dual-message processing:

With single-message processing, a bundled authorization and capture request results in a full-financial transaction, which moves funds immediately.
With single-message processing, the capture amount and authorization amount are the same.
Several services and features are not supported for single-message processing because they are not applicable or could create reconciliation problems.

Single-message processing (SMP) is performed automatically based on the kind of payment card that is used for the transaction. To perform SMP, request the authorization and capture services at the same time. The response message includes authorization and capture results. The authorization amount and capture amount are the same.