Debt purchase contracts a kind of contract in which the long term debt of debtors is bought with a price less than its real price by debtor or a third person. Although there are a wide variety of opinions about the legal status of this subject, it is accepted in most cases. Nowadays, considering the existence of a broad range of debts and the contracts based on them, and also employing the mentioned contract in society, it was necessary for the legal status to look for its permission, conditions, and effects. Finally, in 1389, after submitting the proposal by the juridical council and defining debt purchase and its functions in bank system, the mentioned contract was included in 98th article of 5th development plan and its executive recipe have mentioned some rightness conditions of debt purchase contract such as being real, being able to liquidate, and so on. Therefore, nowadays debt purchase contract is considered as one of the financial tools and credit supply resources in banking law and some banking contracts could be made in the form of of debt purchase such as: credit contracts, deposit and bank loans, credit cards contracts.