Wow.. I'd never even thought of looking out for this.

I still remember my Mass. license number (557-SRF [I think]) and my Rhode Island license number (OK-502!), but I still don't know my Michigan number, which I've had for more than a year now! It is one of the pretty plates with the silhouettes of the peninsulas and the Detroit skyline and the Mackinac Bridge.

I will make it a point now to memorize that one or at least write it down somewhere handy in case anything like this should happen.