APOLOGY TO CUSTOMER FOR BILLING ERROR: CHARGED TOO MUCH, CUSTOMER COMPLAINED

Dear Felix

Thank you for your [STATE FORM OF COMMUNICATION, ex. telephone call yesterday], which prompted me to check our records. You are absolutely correct.

In error, we have over-billed you by $[AMOUNT] on invoice #[ INVOICE NUMBER]. [STATE NATURE OF ERROR, ex. Instead of charging you for the four units you ordered and were shipped to you, we charged you for five.] Please accept my apologies.

I have immediately nullified the incorrect invoice ([INVOICE NUMBER, ex. #A423F]) and issued you a new one as follows:

[LIST NEW INVOICE DETAILS, ex.

4 Magna flux compressors @ $5,000 $20,000

Tax @ 5% 1,000

Total $21,000]

Let me assure you that I will personally inspect our invoices to you in the future to ensure that there will be no further errors. {STATE INCENTIVE, IN ANY, ex. Since I feel embarrassed over the matter, I will offer you a 5% discount on your next order.} Feel free to contact me at XXX-XX-XX if there are any other issues you wish me to address.

Regards
Lydia