What are the barriers to marriage?

According to the Turkish Civil Code, people who are related to each other by blood ties up to 2 degrees cannot marry. Examples of these are siblings, father, grandchild, uncle, niece and aunt.

If the spouses are divorced, any of the divorced spouses cannot marry the descendants and ancestors of the other spouse. Another provision regarding the prohibition of marriage in the Turkish Civil Code is adoption. A marriage contract cannot be established between the persons adopting the child and the adopted child.