I checked my license plate on DC's traffic ticket website today just to see if I have any camera tickets pending.
Turns out I got a parking ticket last week. My car was definitely there, but I never saw the ticket anywhere.
Does this matter at all in contesting it? I'm tempted to ignore it but I know it'll double at some point if I don't pay it.
(FWIW I might contest it anyway -- it was for residential parking and when I look at street view, it looks like it was a block that allowed parking from both the zone in question and the next zone over, since it's near the line.)