A formal letter is a type of written communication that follows a specific structure and style. It is typically used for professional or official purposes, such as job applications, business correspondence, or requests to organizations. The tone is respectful and polite, and the language is clear and concise. In a formal letter, the sender's address, date, recipient's address, salutation, body, closing, and signature are usually included. Common formats include business letters, cover letters, and inquiry letters. Proper formatting and attention to detail are essential to convey professionalism and respect.