9. Is there a ban on donations from corporations with government contracts to political parties?

Article 16, Turkish Political Parties Law 

Article 66: Government departments funded through the general and annex budgets, local administrations and offices of the headmen, state economic enterprises, banks and other organizations established by special laws or by the authority granted by special laws, enterprises, which are not defined as state economic enterprises but the paid up capital of which is partially owned by either the state or the agencies, administrations, enterprises, banks or organizations mentioned in this paragraph, shall not, under any circumstances whatsoever, donate any movable or immovable assets or cash or any rights to political parties or allow usage of such assets or rights free of charge; they shall not make a disposition of the transfer of real rights to political parties other than in accordance with the provisions of the law by which they are bound. Professional organizations that have the nature of public agencies, labour unions and employers’ associations and their umbrella organizations, associations, foundations and cooperatives may provide financial assistance and make donations to political parties in compliance with the provisions of their special governing laws.

Law on Presidential Elections

Turkish Political Parties Law also strictly prohibits the donations from following legal persons:  General and annexed budget departments, local administrations and muhktars, state economic enterprises, banks and other institutions that are established via the authority of private law, state economic enterprises and institutions that have state paid capital cannot donate to political parties.