[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],

In reference to your invoice #[INVOICE NUMBER], enclosed, please find our check #[CHECK NUMBER] in the amount of $[AMOUNT].  [STATE WHAT YOU BELIEVE WILL BE THE STATUS OF YOUR ACCOUNT ACCORDINGLY, ex. In consideration of this check, I believe we owe a balance of $1,000.00, due 15 days hence.]  Please call me if I am mistaken.

Sincerely,

[YOUR NAME, ex. Jill Jones]