It can take some getting used to, and may feel wrong, but leaving tips of 15-20% in restaurants is absolutely not the norm in Italy. Italians typically round up if service has been especially good – leaving a €20 note, for instance, on a bill of €17-18 – but no more. It’s also important to note that credit cards are not as widely accepted in Italy as they may be where you live, so even for a restaurant bill of €50 or more you should be prepared to pay in cash. If you do use a credit card, there often isn’t space to write in a tip – further indication that not tipping is completely normal – but you can leave a couple euro on the table or give it directly to the waiter if you like.