One day, while helping someone get their car out of an impound, i was informed by the officer on duty that my license was not showing as valid. They couldn't tell why though, said the status/notes listed made no sense to her, and i should contact the Denver office to find out what is going on. I was rather confused, as it had been many years since i had last been pulled over, for a minor speeding ticket.
Denver was similarly confused by the details. After some research, they tell me what appears to have happened was i paid my ticket years ago by check, in person. They recorded they received the check on time, but either due to a clerical error or something (they aren't sure), a late fee was assessed on my ticket prior to the payment being processed. The fee was, i think, $5.
Around this same time, i moved, and while i changed my address with the USPS, i didn't with the DMV. The DMV was thus sending my "you owe us $5" letters with "Do Not Forward" instructions via the USPS, who were knowingly delivering the mail to the wrong address (my old place).
When i discovered all of this, years later, my license had been suspended for 54 weeks due to delinquency. In CO, if your license has been suspended for over 1 year, you may not just satisfy the debt, you must also retake your driving test. But since i didn't take my original test in CO, i would also need to re-apply for a permit and pass a written permit exam before being allowed to schedule my drivers test.
The poor lady i spoke with in the Denver office recognized the sheer absurdity of everything she was telling me, but could do nothing to fix it. She also let me know the outstanding debt was now $15.