What is the ruling on twenty dinars that one of the brothers who works in the market, buying and selling, found when he calculated his accounts at the end of the day?

The questioner : If you would allow me, one of the brothers works in the market, buying and selling. At the end of the day, he calculates his accounts and finds an extra twenty dinars with him. What should he do with them?

The Shaykh : I do not understand how it is extra for him.

The questioner : He calculated his accounts, selling and buying, and so on.

The Shaykh : Is he a wage-earner, or is he the owner of his own business?

The questioner : He is the owner of his own business.

The Shaykh: All right.

The questioner : Yes, he says he found twenty dinars in the accounts, extra over his calculation.

The Shaykh : Is it possible that someone paid him twenty dinars by mistake?

The questioner : It is the total for the full day, the entire day’s earnings, and he found twenty dinars extra, as the brother Sami says.

The Shaykh : I understand, my brother, I understand what he is saying, but is it possible that someone paid him twenty by mistake?

The questioner : It is possible that it happened; perhaps, as the brother Mu'adh says, one person’s mistake was in one, two, three, or four dinars, more than one person’s mistake, meaning it is not necessarily with just one person...

The Shaykh : It is possible that he made the mistake.

The questioner : He came out according to his calculation and did not make a mistake.

The Shaykh : May you be safe, Professor.