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'm not sure how to best say it so here goes:
THANK YOU!
[CLOSING REMARK TO TIE IN THE ACT, ex. I was able to obtain the apartment as a result of the glowing character reference you gave me].
You are a true and genuine friend and I appreciate very much the thoughtfulness and consideration behind your kind act.
Sincerely,
[YOUR NAME]