Sell off Debts in Exchange for Debts

“Abu ‘ Abd Allah (a.s.), has said that the Messenger of Allah has said, ’It is not lawful to buy a debt with debt (on credit).”’

“I once asked abu Ja’far (a.s.), about the case of a man to whom another person owes a loan and a third person buys the loan from the creditor to collect it from the debtor. The collector demands the debtor for payment;…

“I once asked al-Rida’ (a.s.), about the case of a man who buys a loan to collect it from the debtor and demands the debtor for payment. He (the Imam) said, The debtor pays what the collector has paid to the creditor and…