There's no real place to put the vendor's invoice number on a PO or on a payment.

When I create POs from vendor invoices, I end up typing the invoice number into the notes. Transactions have more reference fields than POs do, so it would help to have the same on POs.

When I send a payment directly to a vendor (no PO), the memo field only takes 10 characters and there's no second field for an invoice number. Some of our invoice numbers barely fit, and I can't add a secondary reference at all.

Please add an invoice / reference number field to POs and payments (or raise the memo limit) so we can match payments and POs back to vendor invoices without workarounds.