Selling a banknote to a bank

Q 1: What is the ruling on the following transaction: a person buys a commodity from someone and both parties agree to pay its price within one or two months. Therefore, the buyer signs a promissory note to the seller in which the price is registered, as well as the date of payment and the name of the purchaser. Afterwards, the vendor sells the promissory note to a bank and it pays the value of (the promissory note) in return for an interest taken from the vendor. Is this transaction permissible? (Part No. 13; Page No. 371

A: Purchasing a commodity for a fixed period in return for a fixed price is permissible and writing the price is requested by Shari`ah because of the general meaning of the saying of Allah (Exalted be He): O you who believe! When you contract a debt for a fixed period, write it down. It is not permissible to sell the promissory note to a bank with an interest paid by the seller to the bank to take his money and the bank receives the sum that is written in the promissory note from the purchaser.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.