Here is the standard block format that I have used since 1972. It still applies today.
(1 to 1-1/2 inches from top of page, based on size of your letterhead)
September 1, 2012 (Hit Enter 4 times)
Mr. Ed Brown
President
Acme Frames
101 S. 24th St .
Jefferson City , MO 63141 (Hit Enter 4 times)
Dear Mr. Brown:
Thank you very much for your order. We were very pleased to receive it today. You have my assurance that the order will be shipped today, 100% in-stock and complete.
We appreciate your business very much and look forward to serving you again in the future. To show our appreciation, enclosed is a $10 coupon to use with your next order.
Sincerely, (Hit Enter 4 times)
Joseph A. Smith
President
JAS/cp
Enclosure
c: Ms. Connie Smith, Manager