Other people’s cars are always parked in your parking space. How to say this politely?

Other people’s cars keep parking in your space. This is because the other party is wrong, so there is no need to tell her tactfully, but directly tell him not to stop next time. Because that's your parking space, which you bought with money. Just for the convenience of parking. And his car always occupies your parking space, causing you great inconvenience. It is very inappropriate for him to use this parking space without spending a penny.

If you find his car occupying a parking space next time, you will hold him responsible and make reasonable compensation for the losses you caused.