Hello Ravikiran A,
If I understood you correctly, what you are describing would be a third party order.
"In third-party order processing, your company does not deliver the items requested by a customer. Instead, you pass the order along to a third-party vendor who then ships the goods directly to the customer and bills you."
You can have a look at this documentation in the SAP Help for more information on this:
Third-Party Order Processing - Sales (SD-SLS) - SAP Library
I hope this helps...
Have a nice weekend!
Pedro