I have an ongoing rental agreement, my landloed is a Brit but nonetheless I still had an agreement drawn up in both Turkish & English. I did not use one from a shop, I had it done so that it suited both parties. I also went & had it Notorised, why? Because that agreement counts for nothing on things like, residents permits, electric, water etc, its also protection for all.
I do know of a case where someone took out one years rent from a Turk, three months into the rental the Turk sold the property & the people had to get out.
If I was a "landlord" I would take a large bond off the tenant, the tenant could walk out & leave you with huge bills. I now have put the leccy in my name & paid for the new meter, that takes some of the worry off the landlord, his concerns being that I would or could leg it.