If the certificates are anything like the SVT ones... They would show your car's production number, and how many were built. ie... #347 out of 5000 built. ETC....
If not, I wouldn't see much point to it. It's not like I picked it up at the flea market and need a paper telling me it's legit.
I was kind of surprised when I called in though.. With the Raptors, the production #'s were easy to get. You can call anytime with your VIN and they'll tell you over the phone, just have to pay if you want the paper. But when I called in about the FiST #'s, I was flat out denied.