Is it permissible to use intermediaries (wāsiṭāt) to waive the real estate loan of the deceased father, knowing that he was not regular in his payments? And is it permissible for the agent to pay his share of the loan and give the remainder to the heirs if they object to the payment?

There is no harm in interceding to waive the loan for the deceased, provided that the one who waives the debt is authorized. If the bank does not waive the debt and it is due, it must be paid before the division of the inheritance, because the soul of a believer is tied to his debt until it is paid off. If the debt consumes the entire inheritance, then the entire inheritance is used to pay it off. However, if the debt is deferred or installment-based, the heirs must deal with it according to what was explained in the aforementioned fatwas. It is not permissible to divide the inheritance before the debt is paid or waived, and if the heirs refuse to pay, the matter can be taken to court.