K1 VISA MUMBAI: How to Pre-Register for Courier Services ?

[Harshasg]

Hi, my Fiancee will be attending her K1 Visa Interview at US Consulate, Mumbai on Jan. 27th. She will be travelling from Bangalore and we have given Bangalore VAC as Passport collecting Location.

Now where and how do I Pre-Register for Courier Services, so that Mumbai Consulate can Courier back her Passport after Visa Stamping ? Any help is appreciated.

HG