Parking on unmarked private parking

Hello, I would like to ask a question about this: Here in the area are some parking spaces directly on the street in front of the curb, but also parking spaces on the other side of the pavement. However, these parking spaces are not marked, that this is a private property or a private parking place. The plot beyond the curb rather evokes the appearance of a public parking place at first glance. I accept this, because the new tenant has turned me on rather obliquely and rudely, but I would still be interested in the exact legal situation. I’m curious to see how you can see it… As I said, I accept this very well, but I should also find this marked accordingly. It also does not help if I do not have any other land. Parke and 5 minutes later the next one is again unknowing on this private property.