Hello everybody!

I'm a lady from Bulgaria and I need your help. I'm also a lawyer.
It's interesting to me what is the name of the Turkish law for property,first?

And now my question!

A friend of mine is a inheritor of his grandpa's lands. But they are in Turkey, in Odrin. His grandpa and his family are emigrands from Turkey. When they came in Bulgaria they left their lands in Turkey and they didn't arrange their relationships with the Turkish government.
Now,after 100 years, the inheritor wants to get recovery or to reinstate his grandpa's poverty in his posession. He has all necessary documents including muniments.

Please,can you help me to arrange this problem or to give me some orientation where I have to search?

P.S. The munimets are from 1893.


Thank you in advance. Teshekkurler. Kolay gelsin.