A confirmation letter is a letter sent in order to validate a spoken agreement. Confirmation letters are most often sent by businesses to confirm the details of a meeting or an appointment with clients.
The confirmation letter's main purpose is to ensure both parties involved in any transaction are on the same page and have the same knowledge. In the event of conflict, confirmation letters serve as a record that can be used to clarify which party is in the wrong. Confirmation letters can also serve other purposes; an individual may send a confirmation letter to indicate the receipt of a package, for example. Companies may also send confirmation letters to new employees informing them that they are hired.