Mechanic's Lien Release - need separate one for each subcontractor?

[Mike Oconnell]

I am typing up a Mechanic's Lien Release to be used when completing my rehabs (in Virginia) and making the final payment to my contractor. How do I protect myself from liens from my contractor's subcontractors and suppliers? Do I need to get all of his subs and suppliers to sign the Release also? I sometimes don't know every subcontractor and supplier he's using.

Any input would be much appreciated!