Question:
How is it to purchase and sell the dollar and foreign currencies in the black (market) i.e. at a higher rate?
Answer: حامدا ومصليا ومسلما
There is no interest (ribaa) is this transaction from a Shra’ee perspective. However, going against the law is placing one’s honour at stake, which is not correct.
And Allah Ta’ala knows best.
(Hazrat Mufti) Ahmed Khanpuri (May Allah preserve him.) 7^th Dhul Qa’dah Al-Haraam 1412 AH
Mahmoodul Fatawa Vol.5 Pg.434