To whom it may concern

Factual Questions
1

I read on a letter " To whom it concerned", with “ed” the past form. But I never

heard or read it in past tense. It should be " To whom it concerns, or To whom it may concern".

I want to make sure that " To whom it concerned" is definitely wrong, and it is not an alternative way of saying it.

Thanks.

2

If this is the opening to a letter, it is certainly odd and almost certainly a mistake. As you say, “To whom it may concern” is the more standard opening. However, it is impossible to say for certain that this is an error without knowing more about the context.

3

i never use that as a greeting so it doesn’t concern me.

4

If the letter was a complaint about some neglect that caused irreparable or irreversible outcomes, it may be that the writer used the past tense intentionally, to underline the point - but it’s not standard usage as far as I’ve heard.

5

I know of no other variant or tense to “To whom it may concern.”

6

I don’t see how it could be used in the past tense, considering there’s an implied “This letter is to…” in front of the greeting, not “was to…”