[Swancoat]

The last several cars I've owned have had a similar bracket that mounts right on the bumper like that. The best was actually the Corvette though, because the bracket basically mounts with a few circles of two-sided tape. (Not only does that not damage the bumper, but a lot of people would mount the plate to the bracket, and then expose the tape and just get it dirty and throw it in the back. Then if you get questioned regarding no plate, you can show the cop and say, "yeah, it just fell off and won't stick now, and I haven't got the new tape").

Another nice option was the E36 3-series, which had a removable bracket, and BMW would sell a $30 trim piece that mounted in its place and provided a clean look.