All borrowers need to sign the home loan agreement. You also need to submit post‐dated cheques for the first 36 months (if that is the agreed mode of repayment). The original property documents have to be handed over to the bank at this stage. Some banks also create a document recording the handing over of the property documents to them as security for the due repayment of the home loan.
This document is also called a memorandum of entry and attracts significant stamp duty depending on the amount of the loan in some states. The stamp duty payable on such a memorandum is naturally recovered from you.
Not all banks create this memorandum and hence the stamp duty may or may not be payable, depending on the practice of the specific bank. However, even where no such memorandum of entry is created, the state government concerned may, in the future, demand a stamp duty on the loan transaction, which naturally is recoverable from you as per the home loan agreement signed by you.
Please insist a receipt of original & other documents handed to the bank and also keep a copy of all the documents.