Writing a name coherently on the side of a cup is definitely not a prerequisite skill for baristas, which is why I always tell them my name is Frank, because it's hard to muck that one up.
But some baristas have a real knack for turning a perfectly ordinary and easy to read name into a illegible jumble of letters or a bizarre new word nobody has ever heard of.
If you think you've got the code breaking skills to figure out barista handwriting then you should take the Can You Guess What Names These Baristas Were Trying To Spell? quiz here.
Some of them are really hard to figure out, but they'll all make you wonder what those coffee fumes are doing to their minds!