The ruling on selling a metal riyal for a paper riyal

Question:
The question asks: What is your view on the sale that is common? With the sellers over the phone, where they sell ninety riyals of metal for one hundred riyals of paper. May Allah grant you success.

Answer:
This issue. There is no doubt that it is a sale of currency for currency, a Saudi riyal for a Saudi riyal.
But a metal riyal for a paper riyal, the name is the same, one Saudi riyal for a Saudi riyal, but this is metal and this is paper. The correct view in this, and the one on which a fatwa was issued by the Permanent Committee, is that this is forbidden due to the unity of the type, because it is a Saudi riyal for a Saudi riyal, the type is one. It is not permissible to make a difference in value between them. Some of the scholars, we heard, issued a fatwa of permissibility, but this permissibility has a type of [issue] because the type is one, a Saudi riyal for a Saudi riyal. The difference in material, this is metal and this is paper, this does not affect it as long as the name is one and the state that issued the two currencies is one state and one type. Riba enters into it, so it is necessary for them to be equal, a riyal for a riyal, otherwise the increase is not permissible. Yes.