Some areas of the world have a tax on radios and televisions

Some areas of the world have a tax on radios and televisions. How would you determine if a particular homeowner is in compliance without entering his or her property or tracking his or her purchases?

Solution

radio and television broadcast has been digitized now. It takes place through a device called set-top box. It demodulates the fm, tv signal. Each set -top box comes with a chip-id, and a unique card, through which the viewing habits of an owner could be tracked.