The Turkish Government Portal, you must get a code from PTT (Turkish Government's Postal Service) to access it.
This is the official website of the Government of Turkey where you can find many more useful links.
The site for creating an Appointment for official documents, such as permits for work and residency
https://e-randevu.goc.gov.tr/Reservation/CreateReservation
Link to the website for modifying or canceling the reservation and date for Permits
https://e-randevu.goc.gov.tr/reservation/ReservationQueryScreen
Site of the check-up the current immigration status
https://vatan.nvi.gov.tr/moduller/basvuru/basvurudurumbilgi.aspx
To Validate Work-Permit
https://izinsorgula.csgb.gov.tr/#/app/giris
Website for immigrants to make sure of completing the Turkish National ID for Foreigners
https://tckimlik.nvi.gov.tr/Modul/TcKimlikNoDogrula
To validate the Turkish Foreign National ID Number
https://tckimlik.nvi.gov.tr/Modul/YabanciKimlikNoDogrula
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