What is the significance of the blank lines after the closing in a business letter?

In a business letter, the blank lines after the closing serve a very practical purpose: they provide space for the sender's signature. This area allows the sender to sign their name, lending authenticity and a personal touch to the letter. The signature is crucial in formal communications, as it signifies approval and acknowledgment of the content of the letter.

While some might argue that the blank lines can enhance the overall appearance of the letter, their primary role is functional—to create a designated area for the hand-written signature. In addition, while not strictly mandatory, it is a widely accepted practice to include this space as part of the standard formatting in business correspondence. The presence of blank lines is not intended to indicate the letter's completeness or professionalism by itself; rather, it's about ensuring that the sender's name is clearly and appropriately presented.