There are laws regulating the importation of personal goods into the country, which are strictly adhered to especially coming from Eastern European countries like Yugoslavia, Bulgaria and Romania. Anyone importing goods which are forbidden will incur problems with the customs police, which will complicate their departure.
Customs Formalities generally include forbidden or limited items being brought into the country, or items registered beforehand in the owner's passport. In general, all types of sharp instruments and weapons are forbidden. Personal belongings can be brought in provided they will be taken out on exit. International regulations mean that there are certain procedures for the type and amount of these personal belongings, and the following list should clarify this in detail.
For further detailed information, see the web-site of Republic of Turkey Prime Ministry Undersecretariat of Customs