Giving a gift when returning something borrowed

He borrowed money and the person to whom it was owed has died, and he does not know how to repay it

He took out a loan with interest for his friend, then he repented. What should he do?

Paying a debt with a check which the vendor has not yet cashed

He has a debt for something haraam – should he repay it?

Too much debt

Ruling on taking an interest-free loan from the bank with which his company does business

Giving charity on behalf of others

He took a loan with riba before becoming Muslim – how should he pay it off now?

If one can’t find the lender in order to repay a debt, what should one do?