______________ (Sender’s Name)
______________ (Sender’s Address)

Date: __/__/______ (date)

______________ (Receiver’s Name)
______________ (Receiver’s Address)

Subject: Apology for wrong billing

Respected Sir/Madam,

This letter is in reference to the bill/invoice number __________ (mention bill number) dated __/__/____ (date). Our accounts department just noticed that there was an error in the bill given to you regarding ___________ (items/description). I would like to offer my sincere apology for providing you with the wrong bill.

While investigating this matter, we came to the conclusion that we have __________ (mention the error made). On behalf of _____________ (mention name of the company), I would like to offer my sincere apology for giving you the wrong bill.

Therefore, I regret for the unprofessional behavior from our end and sorry for the inconvenience caused to you. A newly generated ______ (bill/invoice) has already been attached with this letter. Kindly, check and update in your records to avoid any further inconvenience.

Thank you for your understanding and support. If you wish to contact us, you can reach us at ____________ (contact details).

______________ (Signature),
______________ (Name),
______________ (Contact details)

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