Other people's cars are always parked in your parking space. How to put it mildly?

Other people's cars are always parked in your parking space. It's the other person's fault, so you don't need to tell her gently, just tell him not to do it again. Because that's your parking space. You paid for it. Just for parking convenience. Moreover, his car always occupies your parking space, which causes great inconvenience to you. 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 should hold him accountable and make reasonable compensation for the losses you caused.