He wrote a Check for Riba unknowingly

Question :

A man on the street said to my brother, "Please fill out this check in the name of so-an-so," and he told him his name. The man who was speaking to my brother informed him that this money was a loan for the Face of Allâh. However, after that, my brother discovered that this money was Riba money. Then, my brother regretted what he had done. We hope from Allâh that we find a beneficial answer from your Eminence.

Answer:

If the matter is as you have mentioned, in that your brother did not know it was Riba at the time of writing the check, there is no sin on him. He is not included in the threat that is reported concerning the curse of the one who devours (i.e., takes) Riba, the one who gives it, the one who writes it and its witnesses.

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