A confirmation letter is a formal document used to verify and confirm details about an event, agreement, or arrangement. It typically includes information such as the date, time, and specifics of the subject being confirmed, whether it’s a meeting, job offer, or reservation. The letter serves to acknowledge receipt of information or acceptance and to ensure both parties are aligned on the details. Its tone is clear, professional, and factual, providing reassurance and clarity to all involved parties about the confirmed details.