ahh - so it's simply a register of guests? A bit like we have been doing with our Sitesi managers for the last couple of years.
I'll look into this a little more when we are over next month. If it means we can let friends and family stay (and just pay the sitesi manager for the electricity they use) then that will be all we need.
Thanks
Stoop - we're out here now and have spoken at length with Cenk and cleared up the grey area for those of us who do not rent commercially and only have friends and family stay.
Unfortunately, we are completely disadvantaged by the new rules and it basically means that you can't let friends and extended family stay for just a nominal fee for electricity, etc. or even for free.
The only way around this is to go through the full registration process (IIRC with all the necessary fees an initial 2500TL set up). You then have to have an accountant so you'll have to spend money each month to prove you earned no money! You would then also have to report anybody staying at your property using the online system between midnight and 1:30am every day. (Oh, and if the system crashes or just simply gets overloaded (which is likely!) then you'll have to take a physical paper copy to the Polis station first thing the following morning to avoid a fine!)
As long as it is an immediate family member (grandfather/mother, mother/father, son/daughter, grandchild), with the same surname, then this will not be a problem. If the immediate family member does have a different surname then the advice is to have a birth and/or marriage certificate to hand to prove parentage links. Aunts, uncles, nieces, nephews and cousins with different surnames may well be a problem though and the polis may well not accept they are relatives.
There is also no problem having any friends or family to stay as long as an owner is staying at the property at the same time.
Cenk's advice was to cancel any friends or extended family coming over this year and see if things get a bit more relaxed in 2018. Not great when they've already booked flights but, as KKOB said 'Burasi Turkiye!'