Does a shop have to give you change?

Yes, a shop is generally required to give you change if you pay with cash and the amount exceeds your purchase total. This obligation is part of normal retail practices and is rooted in the principle of fair trade. However, if a shop has a clear policy stating they do not provide change or only accepts certain forms of payment, they may not be obligated to give change. It's always best to check the store's payment policies beforehand.