Question: I recently loaned money to a friend who has been able to repay only part of it. This was an interest-free loan. We exchanged a signed IOU, not a proper shtar with witnesses, since I have always trusted her integrity and only wanted a document that confirms what was loaned and what was repaid. Now that shemittah is approaching, what should I do? Should I forgive the loan? And if my friend is not able to repay it, may I deduct the unpaid money from my ma’aser requirement?