Is giving a debtor more time to pay better than waiving the debt?

Resorting to the National Debt Assistance Center on Defaulted Mortgage

If one of the conditions of the loan is that one should produce an invoice for purchase of household appliances, is it permissible to produce a fake invoice?

Ruling on discounts and cashback offered by e-wallet apps

Is the son obliged to pay off his father’s debt?

He borrowed some gold from his wife, and when the time came to pay her back, the price of gold had risen. Does this come under the heading of riba?