I've got 2 customers that always call me the wrong name. My name is Mark as you may have guessed. The first custy always brings me a cuppa out and says here you go Carl. The second one is often out but finds my note on his mat saying windows by Mark. He then drives round to find me and says here's your note back and your money Graham! I've done em both for over 10 years. To late to tell em now I guess.