So, bad news travels fast. Your charge is about to be told that they can no longer drive. The question is how to tell them.
My mom was pretty clever when she was told by the local police that my grandmother was a hazard to the roadways. She was speeding and driving erratically – right in the heart of school drop-offs and pick-ups. Grandma did not seem to realize that safety precautions were developed for all people – not just her. (I rode with her once and thought I was going to die!)
So, mom contacted the state police and had them notify Grandma by mail that her license had been revoked. Grandma retaliated. She ripped up the documentation and said they had no right to tell her that and she was going to continue driving. So mom took her keys.
In fact, mom took two sets. Grandma was tricky, though. She had a spare set hidden away (for good measure). Mom was shocked, to say the least, when she got yet another call from the local police stating that Grandma was back on the road. This time when mom went over, so did the local police chief. He told Grandma in no uncertain terms that if she was caught again that she would go to jail for driving without a license.
Sometimes it is hard to do the right thing and still have an elder believe that you know that With Age Comes Respect.