MQ Adapter v6 Synchronous Notification Problem!!!

I have configured a Synchronous Notification. This created 2 documents viz one for Request and the other for Reply. The Documentation of MQ Adapter v6 says that the Notification will execute a Service with Input as the Request document and the Service should return the Reply Document.

I want to know that after the service returns the Reply Document where this Document goes??..Whether Adapter returns this doc to the same Queue or to some other Queue. How will the other program (which is waiting for reply) get back this reply??

Is there a concept of return address here??.. if yes how to specify and use it.
Also how can i be sure that the Reply Document is properly handled by the Adapter??

Please help me on this.
Thanx in advance,