Type your address on the first line. Only type the street address, not your name or title. If you're printing on letterhead with your address already listed, there's no need to re-type it.
Hit return to add a blank line, then type the date. Use the date the letter is completed.
Return twice and type the president's name. Make sure you spell the president's name right. On the next line type "President," then return and type the organization's name if applicable and the president's address. If you're writing to the president of the U.S., the address is: The White House, 1600 Pennsylvania Avenue NW, Washington, DC 20500.
Skip a line then write your salutation. A business salutation is always formatted "Dear Mr./Ms. Last Name:." Note the colon after the last name. A comma is never used after the salutation in a business letter.
Insert a blank line then begin the body of your letter. The body should be left justified with no indentations. Single space the text with a blank line between each paragraph.
Begin the first paragraph with a greeting and state the purpose of the letter. Keep your letter succinct and no longer than one page. The following paragraphs should briefly justify and support the main purpose for the letter.
Include a closing after the last paragraph. The closing can be "Thank you," or "Best regards," or the most commonly used closing, "Sincerely." Type a comma after the closing.
Skip three lines to allow space for your signature then type your full name. On the next line type your title, if applicable. If you have any enclosures insert a blank line and type, "Enclosures." If someone else typed the letter for you, skip down another line and include the typist's initials.
Print and sign the letter, then send it off.