from my knowlege of working with the authorities, the normal precedures are that after receiving a written complaint, it has to be followed up on. The owner and pic are investigated in written form with a formal letter. Then the pic is asked, again in a formal, written letter, to respond to the complaint. This all can take some days or even weeks. In the end, unless there is definite proof, it ends up word against word and the complaint gets filed away because there is just no positive proof. Phone calls will very rarily be used as a written statement must be in the files to be usable.
Of course, the best thing to do is continue to follow the rules
