He let him off the debt and now he is asking for it to be paid

No File Exists
Check below answers in case you are looking for other related questions:
Is it permissible for the borrower to promise the lender a gift when paying off the loan?
He owes a debt to the company and he wants to pay it off with the lump sum he receives for retirement

No File Exists
Related Answers:
What should a person who borrowed with interest(Ribba) do?
It is haraam to pay interest because of inflation
Taking a loan in order to buy shares
Is it permissible for the borrower to promise the lender a gift when paying off the loan?
He owes a debt to the company and he wants to pay it off with the lump sum he receives for retirement

Recommended answers for you:
Ruling on kissing one’s wife in the street in front of people
Moving the finger during Tashahhud
Advice to one who does not want to get married
Resisting sexual desires
Jinn Possession