While tipping is standard practice in Britain, with “discretionary” service charges added to the bill at most restaurants, gratuities are not gratefully received elsewhere. In Argentina, for example, tipping is technically illegal. As detailed in this infographic, supplied by the website Wego, you should also refrain from adding 10 per cent in Japan, Oman, Yemen and France (where it will already be included in the bill by law).
Read more : UK Telegraph – Travel