In this article, we discuss how to write a conformational letter, look at sample templates for formal and informal confirmation letters and share some tips. "Dear _____," is always a safe choice.Fill in the recipient's full name or replace their first name with a title like "Dr." or "Professor. Use our sample "Sample Formal Confirmation Letter" for free. Read it or download it to your device. Please bring the following items with you on the day of the hunt: â–¡Reservation confirmation letter. â–¡ Terms and conditions sheet. You are supposed to begin a business letter with "Dear sir, Dear Ms Smith, Dear Jill', etc. Use our sample "Sample Formal Confirmation Letter" for free. Read it or download it to your device.