Pre- Termination Notice stuck to my gate

Got home found a Pre-Termination Notice half way stuck to my gate next to my post box. Is this the new method used by the City of Johnnesburg? Does this method serve any purpose? With the extreme weather conditions we had lately the wind could have blown it away. I phoned the Credit Control Depart. as was told that people do not check their boxes . Why generalize what if somebody just pulled it off? or if it was carried away by the wind.