Let's back up. Why do you think that the a VIN must be STAMPED INTO THE FRAME in order to be valid? I've spent an hour rummaging around the Internet, and everything I've found, without exception, says that the VIN number MAY BE stamped into the frame, but may also be stamped into a metal plate which is riveted to the frame. This is what Shrimp Burrito (above) described, and is done on every standard TM I've seen. A couple other locations such as the entry door frame are listed as possible, but unlikely. I've gone through the RVIA code, which governs almost everything that RV manufacturers do, and VIN location is not even mentioned.
I'm concluding that you need to ask the Registry (or whoever is telling you to do this) about this. With automobiles and trucks, apparently the VIN is usually (always?) stamped into the frame. But not so in all vehicles.
Bill
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