Apology For Incorrect Collection Letter

(your name)

(street city, state, zip)

(date)

(name)

street city, state, zip)

____________

Dear Sir or Madam:

Thank you for sending your payment check on your _____ (month) bill. Our collection letters proceed automatically and occasionally a payment crosses in the mail. This is obviously what happened in your case.  Your check, of course, has been properly documented and your account is currently marked paid in full.

Sincerely,

(name)

(title)