Answer:
For example: A sells $100 to B for €50. This will be permissible if the transaction is carried out in one of the following three ways:
– both A and B exchange the $100 and €50 there and then
– A gives $100 there and then and B will give €50 sometime in the future
– B gives €50 there and then and A will give $100 sometime in the future
If, on the other hand, the transaction is conducted between A and B with the agreement that they will exchange the $100 and €50 sometime in the future, the transaction will not be permissible. The reason for the impermissibility of this transaction is that departing with debt on both sides is not permissible according to the hadith.
(Fatawa Usmani: 3/148, 149)
Mufti Faizal Riza
13/9/2011