SAMPLE - YOUR ACCOUNT STATEMENT IS INCORRECT

[NAME, COMPANY AND ADDRESS]

I believe there has been a slight mistake.

I have just received your [DOCUMENT, ex. your account summary for June].  Unfortunately, I am unable to reconcile your invoices to the $[AMOUNT] figure you state as my account balance.  My records indicate as follows:

INVOICE/PAYMENT                                    AMOUNT

[LIST INVOICES AND PAYMENTS]

I have taken the liberty of enclosing copies of the above invoices and checks.  Please check your records to determine the source of the discrepancy and call me at XXX-XXXX once the difference has been reconciled.

Sincerely,