I live in a condominium with a private parking garage and all the spaces are numbered. Supposedly we have to 'buy' a specific parking spot. One evening I parked in someone else's spot and the concierge gave me notice to vacate the spot or be towed, so I did so. I apologized to the 'owner' of the spot, but he demands a fine of $500 almost three weeks after the incident. If legal notice mentions only the threat of being towed at my own expense and not a fine, is this legally enforceable? Should I talk to the property management or Homeowners Association about this dispute?