If you want to test the last time I lost access to custom plates what I did was made an order for the plate online (which the game will do nothing with) but whilst the order notification is on screen switch to a story modeĬharacter and re-order the plate for their car. The only way I believe you can get your custom plates back is to wait the natural period of the sell limit (I think it's a week to 10 days currently).
All I did was sell common street cars in between missions to supplement income a little. Has anyone else lost access to their custom plates due to hitting sell limits? I have never duplicated a vehicle and don’t even know how. Update: I got a reply from R* support, it was the copy / paste “verify game ”.