Thanks for all the information. The situation has resolved itself for now -- I left a note, and the car is gone. Thanks for the link to how to report issues within Jersey City. I'll keep that handy.

I rent a private parking space, off an alley, with my apartment. Today, after several days on the road, I discovered my spot filled with another car. Other residents in the apartment don't know whose it is.

What recourses to I have? Is this a police matter? Can I have them towed? Does any one have any recommendations that I can follow to keep this from happening again?

Thanks