APOLOGY TO CUSTOMER FOR BILLING ERROR: CHARGED TOO MUCH, CUSTOMER HAS NOT NOTICED

Dear Felix

Since we value your business greatly, I have been inspecting our invoices to ensure that we have made no errors. Unfortunately, however, I have uncovered an error on invoice #[STATE INVOICE NUMBER]. Please accept my apologies for over-billing you by $[AMOUNT].

I will immediately nullify that invoice ( [STATE INVOICE NUMBER, ex. #A423F] ) and issue you a correct one, as follows:

[LIST NEW INVOICE DETAILS, ex.

5 Magna flux compressors @ $4,000 $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. Feel free to contact me at XXX-XX-XX if there are any other issues you wish me to address.

Regards
Lydia