Your question is not clear enough. If you aim to obtain a seizure decision against a person resident in a foreign state, then you have the examin related state's regulations on foreign arbitration awards enforcement.

On the other if you aim to obtain a seizure decision or a an enforcement decision against a person resident in Turkey then you have to look at the Article 43 of the International Private Law.
Pursuant Article 43 of Turkish International Private Law, a foreign arbitration could be enforced in the Turkish Court of First ınstance choosen by both parties. If there is not such a choice of the Court then nearest Court to the residence oh the defendant will be the Court in charge. Even if ther is not such a Court then (as a last resort) the Court nearest to the immovable property of the defendant will be the Court in charge.