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

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

Dear [NAME, ex. Link Building],

I am honored that you would like us to sponsor your charity.  Although I find your cause to be genuine and honorable, I regret that we must decline the use of our name.  Despite the existence of many fine and worthwhile causes, you will understand that we are unable to support many of them.  For that reason, we restrict our sponsorship to only those causes with which we have worked closely in the past.

We nonetheless wish you the best on your mission.

Sincerely,

[YOUR NAME, ex. Jill Jones]