Sample
[DATE, ex. Friday, February 10, 2006]
[NAME, COMPANY AND ADDRESS, ex.
Robert Brown
XYZ Inc.
1234 First Street
Suite 567
Anycity, Anystate 85245]
Dear [NAME, ex. Robert Brown],
I have just heard that you have landed the [NEW CUSTOMER, ex. Albert Industries] account. Allow me to congratulate you! I am certain that this was the result of great work and diligence on your part and I am certain a prosperous and long business relationship will ensue.
Best regards,
[YOUR NAME]