How do you write whomsoever it may concern?
Can you address a cover letter to whom it may concern?
Never use “To Whom it May Concern” or “Dear or Sir or Madam”—nothing could be more generic (not to mention archaic). Your cover letter could be the first opportunity you have to make an impression on the hiring manager, so make sure you show that you did your company research.
Is it whoever or whomever it may concern?
The correct valediction is To Whom It May Concern. The reason we use whom instead of whomever or whoever here is because the word it is actually the subject of the sentence. The person concerned is actually the object. Since whom and whomever are object pronouns, whom is the correct word here.