Why do you put sincerely at the end of the letter?

"Sincerely" is used at the end of a letter as a formal closing that conveys respect and professionalism. It signals the end of the correspondence while reinforcing the sincerity of the message. This closing helps establish a positive tone and fosters a courteous relationship between the writer and the recipient. Using "sincerely" can also indicate that the writer stands by the content of the letter.