how to auto approve invoices which are matched to complex work purchase orders

Summary: how to auto approve invoices which are matched to complex work purchase orders . We use complex work purchase orders with retainage %. Once work is done the supplier uploads the work confirmation through supplier portal and it goes through approvals.

Now once the work confirmation is approved, the supplier will upload the invoice from the supplier portal. Here, we need the invoice to be auto approved if its created against a complex work purchase order.

Content (required): how to auto approve invoices which are matched to complex work purchase orders . We use complex work purchase orders with retainage %. Once work is done the supplier uploads the work confirmation through supplier portal and it goes through approvals.