TIPPING POLICY IN ROME
Tipping in Rome is not a must. In the restaurants waiters are not expecting you to tip, and, in case you want to tip, you do it in cash leaving something (usually the non written rule is something between the 5 and 10 %) on the table when you leave. You never tip by credit card, and you never find a voice for tipping on the bill.
On taxis, you can round the price. If the meter says 14,00 EUR you might leave 15 EUR …
As long as you know that tipping is not an essential part of the worker income. Even if it is always a welcome gesture, nobody would feel offended if you do not tip!