If there is a foreign partner during incorporation, the followings will be needed.
1- Translated and notarized copy of foreign real person (partner)
2- Tax number taken from tax office or a document which shows ID number peculiar to foreigners
3- Notarized residence permit (if he/she resides in Turkey)
4- (For Turkish citizens residing abroad) a document which proves that he/she resides/works abroad and is taken related institutions of that country
***If foreign partner is also the Director of the company, work permit will not be necessary.
Source: Turkish Code of Commerce