What is the Proper punctuation for salutation sir or madam in a formal letter?

The proper punctuation for the salutation "Sir or Madam" in a formal letter is a colon (:).

Here's how it would look:

Sir or Madam:

Explanation:

* Formal letters generally use a colon after the salutation.

* Using "Sir or Madam" as a salutation implies a formal tone, making the colon the appropriate punctuation.

However, if you are unsure about the gender of the recipient, you can also use the more neutral salutation "Dear Sir/Madam." In this case, you would still use a colon after the salutation.

Example:

Dear Sir/Madam: