Which of the following is NOT typically included in a formal business letter?

In formal business letters, the inclusion of personal anecdotes is not appropriate. A formal business letter aims to convey information clearly and professionally, focusing on the subject matter relevant to the correspondence. Personal anecdotes, while they may provide warmth or context in informal communication, can detract from the professionalism and purpose of a business letter, which is to present information in a straightforward manner.

The essential elements of a formal business letter include the signature, which validates the document and identifies the sender, the subject line, which provides a clear indication of the letter's purpose, and the inside address, which specifies the recipient's name and address. Each of these components contributes to the overall structure and clarity of a formal business letter, ensuring that the communication is effective and professional.