What is the ruling on the custom of giving a sum of money on occasions, with the recipient being obligated to return the amount or more, and is the increase considered usury (riba)?

"Naqoot" (monetary gift) given on joyous occasions is a loan that must be repaid, unless custom dictates it is a pure gift. Jurists have stipulated that it is a debt that must be returned to its giver, and if the giver needs it and requests its return, it must be repaid immediately. As for the increase returned with the "naqoot," it is a form of reward and solace, and not part of the original loan.