I PAY RS 4000/- AS RENT AND THE RECEIPT IS GIVEN BY THE LANDLORD ON A PLAIN PAPER BUT IT DOES NOT HAVE REVENUE STAMP.IF I ASK THE LANDLORD TO AFFIX A REVENUE STAMP

WILL IT BE UNJUSTIFIABLE OR IMPROPER OR CAN HE REFUSE TO DO SO?IF HE REFUSES WILL THESE RECEIPTS BE VALID FOR HRA EXEMPTIONS UNDER IT ACT?PLEASE GUIDE ME IN THIS ISSUE.