Dear Proformics-HR,
We, the members of this forum, are outsiders and do not know anything about the nature of your industry, the client who raised the invoice, who signed or reviewed it, or how the incorrect billing was discovered. Without this information, it will be difficult to provide you with a draft.
Therefore, I request you to prepare a draft on your own and upload it to this forum. Some seniors like me will review and correct it. When preparing the draft, ensure you include all the aforementioned details and specific information of the invoice, such as the Invoice No. Instead of mentioning the client's name, you may leave it blank.
Thanks,
Dinesh Divekar