I had given a loan of rupees 1lakh to my friend through cash one year ago. He had promised me to return the amount in 10months, but now he is not returning my amount. I had given him the loan without any loan agreement in friendly basis. But now I have argued enough in this regard. He was paying me interest of 10% per annum. What should I do in this regard ? Should I make a promissory Note? If so, whether promissory note should be attached with a revenue stamp? Please do reply to this briefly as possible.