A credit note is generated by the system when you cancel an invoice after reopening an account.
Click 'Clients'
Click 'Client 'Search'
Search for the client and click on their name
Click 'Transactions'
Click on the credit note
An automated system generated credit note will always have a generic reference. The test will always be Reverse Invoice: and the invoice number
Generate the credit note
If you receive the following message:
This means that the credit note was manually added and is not associated with an invoice. This means that if you need the document, you will need to manually create it as the system does not have the data required to create the document from the available data.