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],
Allow me the opportunity to compliment and congratulate you on your new house! I hope the move was not too troublesome and I am certain that it will be a place of much joy and happiness for you and your family. It is a pleasure to hear of this happy news!
Best regards,
[YOUR NAME]