Can you get an invoice to show paid if it is $0.

Hello All

I would like to be able to clear invoices that are $0 so that when I query "unpaid" invoices I do not get them returned to me in the list

Is there a way to print  a "check for $0 " or do a clearing transaction that would pay invoices that are $0.

I can put these invocies in ONE pay group to select them but at this point I can not see any setting that will actually get them to Show PAID

Any info in this regard would be greatly appreciated.

Carolyn