Third Request for Correction of Billing Error
This is the third letter regarding the request for crediting my account.
Enclosed are copies of previous letters, to avoid having to set forth the same information for you again. Unfortunately, this is becoming quite annoying by all of the late notices you have been sending in error. It would be greatly appreciated if someone would straighten out the problem that exists on your end.
The difficulty you must have in maintaining all of your records is understandable. If you would bring my correspondence to the attention of your credit manager, they may decide to suspend the mailing of these notices until this problem is resolved.