What is the ruling on depositing money in usurious banks for the purpose of settling commercial debts via bank checks that do not include interest, knowing that this method is the only available one for commercial transactions?

It is impermissible to deposit money in an interest-based (ribawi) bank, except in cases of extreme necessity, such as fear of loss or theft. In such a situation, the money must be placed in an account that does not generate interest. It is not permissible to use interest-based earnings to pay off debts; rather, one must dispose of them by spending them on matters benefiting Muslims, such as hospitals, roads, and assisting the poor.