Where can I find the receipts that have had an expense created but aren't attached to bank transactions?

Let's customize the Transaction List by Supplier report and cross-reference your history to find receipts that aren't attached to bank transactions.

Here's how: 

1. Go to Reports and select Transaction List by Supplier.
2. Set the correct Report period.
3. Click Customize, open the Columns drop-down.
4. Tick Cleared to show which entries are uncleared.

Afterwards, open a new browser tab and go to All apps > Accounting > Receipts > Reviewed. Compare the uncleared expenses from your report to see which are from your receipts.

You're always welcome to visit this forum if you need additional help.