Many years ago, I worked in a photographic store. We developed film and printed photos, primarily. One of the women took in a film for development, wrote the customer's surname in the name box, then wrote "Matt" over the name.
It's fortunate that we would hand out the top slip so we would match the packet numbers, because when the customer came back into the shop we couldn't find her package. We did find one for a Matt Sullivan (or whatever the surname was). It turned out she was quite annoyed with us for not printing it in matte as they asked, so we reprinted it at no charge and she got to keep both sets.
The staff member argued that she had written matte ("See? It says Matt right there." "That's the name, not the paper type. The paper type has an -e at the end.") on it, it's just that language changes and we had to accept and adapt to it. Didn't matter what her argument was, though, because she screwed up and it cost the business money.