In this article, we discuss how to write a letter with two signatures and provide an example letter for you to use as a reference. Do not capitalize every letter of a member's last name, except in the subject and signature lines.STEP 1: Identify who to address the letter to. An acknowledgment is one of the most common types of notarial acts, but it often confuses Notaries. Here are 5 steps to performing an acknowledgment. Suppose you have to write a letter. How you want it to appear? A letter to his most Excellent Majesty, George the third, King of Great-Britain, France, and Ireland, and Emperor of North America. As shown in Table 16: Page 69.