Austin Parker
123, X Street, Y Avenue
Manhattan, NY-10009
(123) 456-7890
[Subject: Normally bold, summarizes the intention of the letter] -Optional-
Dear Austin Parker,
I really apologise for not having sent you the payment for the previous month. I noticed an irregularity in the accounts statement and I really wanted to make things sure before I take any action.
Since, yesterday, the bank acknowledged the error, so now I am processing your funds transfer. Not only this, the bank has assured me that such things shall not be repeated in the future. I appreciate your patronage and look for the same in the coming future.
Sincerely,
Kakra