How To Write A Good Official Letter . Letter to government example 1: Address the letter by affixing sir/ madam to the concerned person. How to Write A Business Letter, Format, Samples & Examples from upscbuddy.com Choose a formal salutation, such as dear, and address the recipient with the same title you used above. Do not leave a blank line between the sender’s address and date. This page has 30+ formal letter format examples and professional letter samples.