What information is contained in the signature line of business letter?

The signature line of a business letter typically includes the sender's name, title, and organization. It may also contain additional contact information, such as a phone number or email address, depending on the formality of the correspondence. Sometimes, it includes the date and a closing phrase, such as "Sincerely" or "Best regards." This section serves to authenticate the letter and provide the recipient with a means to follow up.