Riyad Bank presented to me some valuable stationery as gifts offered to clients. Is it permissible to use such gifts? And if not, what must I do? May Allah guide you to goodness.

First, to be on the safe side, the questioner’s account must be in a non-usurious bank.

Second, as a precaution, it is better to give away the stationery to someone who needs them or as a charity. Anyway, you can keep it, according to a well-founded opinion of some Muslim scholars (such as Ibn Mas`ud and others) that it is ok to accept gifts from a usurer.