What was license plate technology like in the late 90s?

My main character is a woman who is swiftly forgotten by people 60 seconds after they stop interacting with her. She drives around the country in an RV along with a friend of hers who seems to be the only person on earth immune to her powers, and I'm trying to figure out how difficult it would be for her to avoid attention from the police.

My heroine's powers make it all but impossible for her to get a legitimate driver's license (though she has the means to get a fake one) and, I suspect, to properly register her vehicle. And I've seen in modern bodycams of traffic stops that modern police have the technology to know almost immediately if a driver's license is legitimate or, more importantly, if a car's license plate is legitimate. However, my story isn't in modern day USA, but in 1998 USA, and I'm trying to get a sense of what her obstacles are going to be back then, and whether or not she's going to get stopped by cops all the time for having an improperly-registered vehicle.

 

If she doesnt break the law or doesnt have a suspicious car, there are no reasons for the police to scan her plates or ask to see her license.

Unless she goes through a roadblock or checkpoint where cops are checking IDs of everyone.

Also, license plates are stamped metal in most states. If a licence plate looks like its been printed or the letters/numbers look stuck on or if things are falling off of it, that may make a cop do a double take

 

I got my license in 1996, and that was around the time states were starting to get a little fancier with their plates. Before that, most chose a solid background color and letter color on stamped metal. If she's not opposed to the ethics, you could have her pull some plates off a parked car and then ride to the next state, rinse and repeat. In any case, I don't think she would have issues with the plates being scanned, but the small colored registration stickers could be an issue. Those could get spotted by a parked police officer and prompt a pull-over even if there's not a moving violation. There's also no EZ-Pass cameras (or at least not as many) around that time, although those would only trigger a mailed tickets in the modern day.

Long story short, I don't think it would be an issue. I just went five years without an inspection sticker before finally deciding that maybe it was batter to get one that feel nauseous every time I passed a speed trap.