Sterling Selling and Fulfillment Foundation provides certain standard out-of-the-box services, which could be used on actions configured from events. These services have been provided in synchronous mode. Some of these services like Receipt Closure, may require to be changed to asynchronous mode to maximize performance.
To make them asynchronous, you would need to copy the current supplied service to another service flow, and change the starting point to one of the asynchronous transports like WebLogic JMS, MQ, and so forth.
In events where the originally supplied service flows are configured to call synchronously, you would need to create a custom service which would publish the Input XML to an asynchronous transport component like WebLogic JMS, MSMQ, and so forth.