All foreign nationals entering Turkey need to obtain a visa whether they are there for a short holiday, to study or for work. Depending on your nationality, you can normally obtain a three-month tourist visa upon entrance to Turkey. This does not need to be acquired beforehand and can be bought on arrival.
If you are going to study or work, you must obtain an appropriate visa from the Turkish embassy before travelling. Normally, if you have secured a job offer from outside Turkey, your employer will take responsibility for arranging the visa.
To work in Turkey, you need a work permit and visa. A passport, visa application form and a letter from your future employer are needed for an application.
After arriving in Turkey with a valid visa, you have 90 days before it is necessary to have a residence permit, though in practice you should apply as soon as possible at the nearest local police department. In most cases your employer will guide you through this process and may in some instances do all of the work for you. Official details, including an application form, can be found at the Republic of Turkey Consulate .
Foreign visitors are required to carry some form of identification (passport or driving licence) at all times in Turkey.