What is the ruling on opening a shop for renting wedding dresses, dealing exclusively with veiled women who affirm that their party will not be mixed, and does the lessor bear the burden of sin for deception in the event that the customer's untruthfulness is discovered?

What is considered in establishing rulings is the predominance of conjecture, as Al-Shatibi said: "Ruling based on the predominance of conjecture is a fundamental principle in judgments." This is further indicated by the Almighty’s saying regarding the female emigrants: "Then if you ascertain them to be believers, then do not return them to the disbelievers." The intention here is to achieve the predominance of conjecture regarding their faith. Also, the Prophet (peace be upon him) said: "So I assume he is truthful, and I rule in his favor."

Accordingly, if you predominantly believe that the renter will use the dresses for ostentatious display (tabarruj), then it is not permissible to rent to her. However, if you predominantly believe that she will not use them for ostentatious display, then there is no harm, and the sin is solely upon her if she uses them for ostentatious display.