Formal letters using my first name

We Gransnetters cover a wide age range.

I can imagine that those at the younger end of the range are much less likely to be annoyed by use of our first name than those at the older end.

I'm in my mid 60s, and don't mind it.
My mum is in her 90s, and i have heard her complain about it occasionally over the years. But some of that has been when the person addressing her looked little more than a child to her (though might in reality have been their 30s or even their 40s).

I agree with Fleur20 but it does not particularly bother me.

Don't you find that it's not usually the name that your friends call you anyway? I don't like the "Hi" that comes before it either.

I don't mind too much unless I have written a strong complaint letter about something and they assume that by being familiar I'm going to capitulate.

I tend to favor the Quaker custom of addressing people without using any style or title and using given name and family name, or whatever the tradition is the person comes from

Thus: Dear Anne Jackson

Dosnt bother me,here in Ireland we know our doctors chemists etc by first names, its nice and friendly

A formal letter should address as MR, Ms , Mrs etc. Any other form is lax.