Marjan, did you vandalize the car parked in your spot, is that what you're saying?

I remember parking in the City, having to scramble for places and getting frustrated like that. My apartment building had a parking garage that was "extra" but at least you had to have a pass to get in.

Is it the same car that keeps parking there? Maybe somebody doesn't understand or is new and has the wrong slot, etc. Are the spaces numbered or anything? I'd write the owners/real estate agency that runs the building at their business address and complain, tell them you'll take legal action (pay less rent) if they don't put up signs of some sort/enforce better.