Entering Invoice for Closed PO Line

We are reevaluating several of our practices and one that has come us is invoices for PO Lines that are closed. How do other handle these?
I'm not sure if there's a way or a setting that would allow the match screen (MA43) to display PO lines that are closed so we could enter the invoice for the PO line and let it trigger a buyer message or something like that.
Is this possible?
How do others handle these types of invoices?