Is there a “black and white” rule to “move fast”? So, with that out of the way, here’s my opinion.

To whom it may concern is used where the letter is issued for use by someone without regard to who receives it, whether a person or an institution etc.

How can the “Dear Sir or Madam” address be

used?

Is there a “black and white” rule to “move fast”? So, with that out of the way, here’s my opinion.

To whom it may concern is used where the letter is issued for use by someone without regard to who receives it, whether a person or an institution etc.

How can the “Dear Sir or Madam” address be

used?

Is there a “black and white” rule to “move fast”? So, with that out of the way, here’s my opinion.

To whom it may concern is used where the letter is issued for use by someone without regard to who receives it, whether a person or an institution etc.

How can the “Dear Sir or Madam” address be

used?

Any has to be followed by a singular noun. Whats is too “grammatically wrong”? Is dismissing common construct considered pedantry?