Is it acceptable to use an exclamation mark instead of a comma in the closing letter?

It is not acceptable to use an exclamation mark instead of a comma in the closing of a formal letter.

Here's why:

* Formal tone: Exclamation marks convey excitement or emphasis. A business letter requires a professional and formal tone.

* Grammar: The comma is the standard punctuation mark after the closing of a letter.

* Clarity: Using an exclamation mark could be misconstrued as overly enthusiastic or even unprofessional.

Correct Example:

Sincerely,

[Your Name]

Incorrect Example:

Sincerely!

[Your Name]

Exceptions:

* Informal letters: In extremely informal letters, like personal notes or emails, an exclamation mark might be acceptable, but it's best to err on the side of caution.

* Creative writing: In fiction or creative writing, stylistic choices like exclamation marks are permissible, but they're not appropriate for formal business communication.