Problem is when you receive a letteg signed 'Yours faithfully, J. Smith'; how do you reply? I sometimes receive 'Yours faithfully, [illegible scrawl]'; I've taken to replying 'Dear [copy of illegible scrawl].
The Queen begins: 'To Our Trusty and Wellbeloved.....Greeting!' Don't forget the !. Not that I receive all that much from Mrs Windsor except when she's masquerading as Her Majesty's Revenue and Customs and then she doesn't bother to sign at all.