It's not rude to regift–but you should take some precautions before giving an old gift to someone new.
Let Time Pass Before Giving the Gift to Someone New
If you’re choosing to keep your regifting a secret, Post says you need to be 99-percent sure the person you’re giving it to and the person who gave it to you aren’t going to find out. Let some time lapse before immediately regifting the item—the amount of time, according to Post, is a personal decision and calls for good judgement.
Don’t Regift Unique or Handmade Items
If someone paints you a painting or gives you a particularly unique or memorable gift (such as an octopus planter), there’s no way to regift these items within your family or circle of friends. Avoid hurt feelings and keep the gifts or regift to a friend or relative who will never cross paths with the original giver.
Be Thoughtful About Regifting
Only regift when you think the item will benefit the person receiving it. In other words, don’t thoughtlessly regift things simply to get rid of them or save money. If it’s not a good match, sell or donate the item, Post advises.