ANDREW HALL
456, X Street, Y Avenue
Philadelphia, PA-19103
(123) 456-7890
[Subject: Normally bold, summarizes the intention of the letter] -Optional-
Dear ANDREW HALL,
We are thankful for you having called us to take our sight towards our mistake in the billing and we are sorry for the doubts that may have occurred. You have also kept a good amount of patience in adjusting with us. The current balance that your account shows is $72.66 right now and the amount will be due in August.
Sincerely,
Barry