They had to inform you what the restrictions were on parking. Even had they given you notice of the 10 time limit before towing the car, they would have to enter into a new contract with you for this new restrictions to apply. They might say that your duty to try to reduce any damages [mitigation] would mean you have to move the car once you got notice of the new rule, but they were negligent in not telling you or issuing the same parking permit for two different cars, as you could not know the permit had been used 10 times that month as you were unaware, and there was no reason you should have known, that you shared the number with another car owner. They are liable for the cost of the towing of your vehicle and getting it back, plus a reasonable value for the time you spent getting the car and perhaps even finding out the needed information. You might also be able to charge them for the time involved in preparing and reading this response and the 10-15 minutes I took in typing it up as you had to seek the advice of an attorney to resolve the matter and it does not matter if you actually have to pay the attorney or not. This is an unusual and somewhat weak argument so I would use it only as a element of negotiating with them as to the total compensation. They must also issue you a new car permit number so it does not happen in the future and you should request, although you can require it, that they notify in writing all other tenants of the 10 times parking rule and check their records to see if the same permit number has been recorded for multiple owners. Since their was both a breach of contract and negligence, you could also collect pain and suffering damages for the latter, even though it would not be much.
Answered on Oct 21st, 2016 at 6:52 PM