As part of the settlement agreement with my ex, I negotiated a lump sum for a car. It’s a long story, it all had to do with the fact that he didn’t want to give me any money from the sale of the house, but agreed to make lump sum payments. E.g. he agreed to a sum to be invested in a new car for the children and me. He then proposed a car that exceeded the agreed value by 40% and stated it would be this car or nothing and it would be owned on a 60/40 basis and it would be my car and he would only use it with my permission, if at all. He wanted that the children and me to have a safe vehicle to travel in. I accepted and he sent an email to confirm this in writing.
This was 4 years ago. He is now stating that I stole the car and he is the rightful owner. He said he has changed his mind about the contract.
The car is registered in my name, I insured, maintained, taxed, fuelled, MOT’d it throughout.
He has the original proof of purchase, but I have a contract that proves my 60% ownership.
I am scared that he will suddenly have the car seized.
Where do I stand with this?