Business Letter Format How To Write A Business Letter Xeroxxerox . This lesson focuses on american business letters. Write the month, date, and year if sending a business letter in the u.s., but start the date with the day (e.g. FREE 7+ Sample Business Letter Templates in PDF MS Word from www.sampletemplates.com The business letter’s precise structure is crucial to its look and readability. Skip a line and type the date so that it. It is a good idea to include sender's email and url, if available.