I was there with a friend to catch up on the past ...

I was there with a friend to catch up on the past five years we spent apart and right from the start, the waiter couldn't help himself but being super flirty even thought we weren't responding to that type of interaction. We would just say "thanks" to his compliments, nothing more. He came to our table more often than necessary, and each time he was just "too much". I could feel he was working for his tips. We ordered sangria first, and when it came, he told us we had to pay right away because the restaurant had been stolen in the past by clients on the terrasse leaving without notice. Since we were going to eat too, I left him my credit card, so the problem was solved. When it was time to pay, we waited but our waiter never came, so we went inside to find him. He told me the price of my sangria (7$) and nachos (13$) outloud without showing me any bill, which I thought was very odd. As I was paying, I recalled that my nachos was 11$ before taxes, which was less than 13$ tax included, and I had no idea what was the price of the sangria. As the waiter gave me my credit card receipt, I asked for the bill. He told me : "hum, it's not yours, but it's the same thing", handing me a random bill for a nachos belonging to someone else. I answered "hum, ok... and what about the sangria? I am self employed and I keep all of my bills, it's important". He said "I didn't print one, but I can go to the bar to get you one". When I told him that he charged me too much, he faked being sorry, admitted his "mistake" and offered to give me 50 cents back (this was only for the nachos, since I had a written proof in front of me. As for the sangria, I still didn't know the real price).

Really? What kind of restaurant/waiter doesn't print the bill before you pay, or round up the bill before they charge you. I read that they also charge different prices depending on where you sit (inside vs outside) and they charge more to Europeans (my friend was from France).

I told that waiter I wasn't buying his "mistake". That according to me, he gave himself some tips by rounding up my bill, thinking I wouldn't notice. Sorry boy, but I know my maths. I told him I was used to give good tips for good and transparent service, and that there was clearly a lack of transparency here. I didn't asked for my money back because I didn't want him to be pissed at me. I wanted him to know he couldn't fool me, and to feel at least a bit stupid to have tried. I hope he did.