Hello! My team is wondering if it would be possible to show overpayment on specific invoices in the printed PDF. My guess is that it is not possible since as far as NetSuite is concerned, the invoice is paid in full, and the portion of the payment that is unapplied (the overpayment) isn't linked to the invoice at all. Am I correct in that thinking?

If you capture that information in a custom field on the record you can include it in the PDF.