If a t receives letters from a client or gives letters, are they required to date them?

Especially if a complaint has been made and several letters are not in the right order, or dated or worse yet, dated incorrectly (possibly in their favour)

[Adyna]

Usually you date letters you write. Never heard of dating letters you receive though. Don't think there is a legal requirement to date personal letters? it doesnt really prove anything...as you said, you can date things incorrectly.

But if a letter is given within therapy, no matter how 'personal', I would have assumed it's still a professional document.

[ArtleyWilkins]

No idea. Maybe some notation of having been given the letter perhaps - if the therapist keeps those kinds of notes - plenty here say their therapist does not keep notes at all, but it isn't an official document or even necessarily saved/kept, so much depends on the situation I would guess.

[Rive.]

I don't know if it is a requirement.

IF you are talking about official letters, I would have thought it is the done thing i.e. without needed to have sets of rules about it.