[DATE, ex. Monday, March 31, 2008]

[NAME, COMPANY AND ADDRESS, ex.
Link Building
XYZ Inc.
1234 First Street
Suite 567
Anycity, Anystate  85245]

Dear [NAME, ex. Link Building],

I have just heard that [FIRM NAME, ex. Johnson & Brown Consulting] has named you a new partner.  Allow me to congratulate you on this appointment!  I am certain your new position was the result of hard work and diligence.  Let me wish you a prosperous future with [FIRM NAME, ex. Johnson & Brown Consulting]!

Best regards,

[YOUR NAME, ex. Jill Jones]