These days, most gifters know well enough that when it comes to clothing items and accessories, a gift receipt is par for the course. In case of size trouble or a relative who means well but doesn't follow style blogs as closely as they should, a gift receipt is handy for swift returns. Chances are you can still return stuff you don't want without one, but often it's taken back at the current selling price, which is usually less than the price the item originally sold for.