It was probably rubber stamped because they charge some (Americans, who are accustomed to tipping well) but not others (French). We had this happen at the former Le Frigate in Oyster Pond. Big red letters: TIP NOT INCLUDED. Followed by 2 handwritten !!. A young French couple that was staying at the same place as we overheard my questioning it, and said that they weren't charged. That's why we avoid places that do this. As previously stated, 15% added to the price you expected to pay is a tip. Le Frigate's explanation of the 15%: "That's so we can sweep the floor and change the table cloth".