The solution is very simple. When the volunteers draw the NOMEX suit, verify the address and IC no, BUT DO NOT confiscate the IC. Ask them to sign a form that they agree to reimburse the cost of the suit if they lose it. They have to return the suit at the end of every day anyway. Whatever it is, DO NOT be so silly to surrender your IC to anyone. This is the first time F1 is held, I guarantee you, sure alot of confusion and mess on race day, especially logistics relating to volunteers. I do not trust the volunteers working for marshal services one bit, so what if they work for marshal services, we do not know their integrity, or their character, or background. You let any tom, dick and harry take your IC, what if they lose it, or use it for something without your knowledge, who is going to take responsibilty. Not worth it right, just for three days of no pay work, and alot of trouble coming your way if something happen to your IC, or if they misplace it or worse?