Re: Cox Trailer ID Tag
Someone probably removed the tag and registered it as home made.
In a state where trailers aren't titled, its easier to make all trailers as home made and avoid having a trailer tag that is trailer specific. If all of your trailers are registered as home made, then it makes no difference which tag is on which trailer so long as you have the right number of axles on the registration.
Once that foil decal is gone, its just another trailer, with no history.
Trailer companies also tend to put the ID tag right where items like the winch stand and trailer jack will mount, so it doesn't stand much of a chance either way.