It is the responsibility of the client application or service to obtain a transaction ID (tid) for each guaranteed delivery request and to specify the transaction ID with each subsequent request for the transaction.

The client application or service obtains the transaction ID from webMethods Integration Server using the startTx( ) method, which is used to start a guaranteed delivery transaction. See Creating a Java Client that Uses Guaranteed Delivery and Creating a Flow Service that Uses Guaranteed Delivery for additional instructions and sample code.