The On-account transactions form doesn’t have the credit note transactions, this can be tracked from the Invoice journals.

There is currently no overview of posted credit note transactions. The only way to check if a credit note was sent is via the invoice journals. However, when the number of invoices becomes large enough, finding a credit note becomes challenging. Furthermore, in the on-account transactions form, the original transaction remains without any matching credit note transactions. This can be confusing for the end users.