Selling in exchange for haram money

Question

Question: Customers come to shopkeepers and buy things, paying with every kind of money — from interest, bribery, gambling (qimar) and theft. Is this money, which the seller receives in exchange for the object of sale, lawful or not? Moreover, escaping it is difficult today. Explain and be rewarded.

Answer

Selling anything in exchange for money about which it is known with certainty that it is haram, and obtaining that money, is not right; where this is not known, there is latitude.

Source: Fatawa Mahmudiyya

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