I would keep them out of To Enter. Instead, if the invoice amount is always different and/or the image must or may be replaced, just don't show it in To Approve. Exclude it from the SQL view. Let these invoices show in the Pending Invoice inbox. Just add a dropdown (in Pending) to filter the results: All Invoices, Only Recurring Invoices, and Exclude Recurring Invoices. Also add a visual indicator (in Pending) for each recurring invoice to indicate that they need an amount change and/or image replacement.
I would keep them out of To Enter. Instead, if the invoice amount is always different and/or the image must or may be replaced, just don't show it in To Approve. Exclude it from the SQL view. Let these invoices show in the Pending Invoice inbox. Just add a dropdown (in Pending) to filter the results: All Invoices, Only Recurring Invoices, and Exclude Recurring Invoices. Also add a visual indicator (in Pending) for each recurring invoice to indicate that they need an amount change and/or image replacement.