lighthearted, I guess.
DH and I both have names that can be shortened and regularly are. DH has never gone by his full name but I do.
I recently spoke to a man in a business negotiation who automatically shortened my name. I found it incredibly rude and undermining, as it is fairly normal for those with my name to go by my full name (I’d say 50/50, but my name isn’t super common). However, I felt too awkward to correct him, especially as I needed something from him.
This led to a disagreement with DH. He feels it’s acceptable to initially shorten someone’s name if they haven’t specified that they don’t go by that name.
I personally think you either ask first or go by the name they are introduced by.
For example, if someone was introduced to me as “Andrew”, I would call them that. DH would say “nice to meet you Andy” and if they didn’t like that name, would expect them to correct him. I think that’s rude.
DH regularly shortens peoples name in a more friendly/jokey way which may be part of the reason, e.g, Gary = Gaz (if on friendly terms), Kevin = Kev, Lucy = Luce. However, if someone is Rebecca, he probably would assume Becky or Bex, even if they’re introduced as Rebecca.
DH thinks my approach maybe more on the side of right but overall, people will be split on this / not think it’s as big a deal as I do.
So:
YABU: it’s perfectly fine to call someone by an abbreviation of their name even if they’ve been introduced as their full name / never told you otherwise.
YANBU: it’s not acceptable to assume someone’s name and you either ask if they go by a shortened name/have a preference or just call them their full name.