Bookkeeping (Canada)

Hello!

I am in a service based industry and we create an invoice for each service. A client might engage with us twice a week which means two invoices. Payment is due at the end of each service.

A client met with us 6 weeks for in a row (one-hour a week) so 6 receipts. They are seeking reimbursement through their insurance but the insurance will not accept the 6 receipts--they only want one receipt.

Am I doing anything wrong by creating a one page document on our letterhead, listing the dates of services, the Quickbooks receipt numbers, totals, GST number, etc and then using a random reference number and make it look like a receipt?

I realize it sounds shady but it would mean that the client can get reimbursed and I would not have to change anything in the books. To be clear, the client has paid us, so this documentation is more for the client and the third party.

Thanks!