ButThere has been information available for months about the new registration for short term holiday apartments and villas. The problem is as always Turkey, laws are general issued, without enough information and with very little organisation. Headless chickens come to mind.
Although this new law may well be aimed at controlling the information required to track people location, it is clearly politically motivated against foreign property owners.
Hotels have had it rough, so what better way on ensuring a better season than by restricting foreigners rent is my their properties out. After all it is the rich that have politicians in their back pockets and rich people own hotels. İt is the same the world over.
Some extra info: http://legalrentalsturkey.com/faqs-2/