Is it permissible to refuse a gift that is higher in price than what was agreed upon when exchanging gifts, or to demand an investigation into the price difference and be given the excess, and what should one do with a gift if it turns out to be forbidden?

What is known as a gift of reward or a gift with the intention of recompense, if agreed upon by both parties, takes the ruling of a sale according to the jurists, and usury must be avoided in it, just as in a sale.

So, if the gift and its reward are from usurious categories – such as money or weighed/measured food – then equality and immediate possession (qabḍ) in the gift-giving session are stipulated.

If the gift and its reward are not from usurious categories – such as handbags, watches, and clothes – then equality or immediate possession are not stipulated.

Therefore, if the questioner refrains from accepting the increase in a usurious gift, her action has a legitimate Islamic basis. If she accepts it, she must return the increase if possible; otherwise, she should return the entire gift and request equivalence. However, if the gift is not usurious, the matter is broader, and she may accept the increase as long as she does not fear being indebted (minnah).

Although this is the more cautious approach to avoid disagreement, some scholars did not consider usury to apply to gifts, even if they were for recompense.