According to Channel 7, 900 photo radar tickets have been dismissed in Denver. The wonderful folks at ACS/Xerox apparently weren’t too diligent about the proper placement of warning signs per Colorado State Law. I myself have seen the photo radar operating without the required signs, and in one case, the sign was intentionally obscured by a coat, and on another, a construction sign. If you made the mistake of actually responding to the ticket in the mail you can get a refund. If you’re smart, you just ignore these letters and let them go away after 90 days.