A driver’s license is a document (identity card) that a driver in traffic uses to prove their right to drive a motor vehicle of a certain category.
The validity of Republic of Serbia drivers licenses abroad can be checked Here
Foreigners who are granted permanent residence in the Republic of Serbia, and citizens of the Republic of Serbia who have returned from abroad, i. e. come to the RS to stay permanently, as well as staff from the diplomatic and consular missions of foreign countries and representative offices of international organisations in the RS, foreign trade, transport, cultural and other representative offices, and foreign correspondents, can drive a car under the international driver’s licence for six months after entering the country.
Operating a vehicle registered abroad: There is nothing to prevent foreign citizens, or citizens of Serbia who are temporarily working abroad, from giving their permission to a foreigner to operate an alien motor vehicle. Similarly, there is nothing to prevent citizens of Serbia who are also temporarily working abroad from operating the same kind of vehicle during their temporary residence in Serbia, but such permission cannot be extended to nationals of Serbia – i.e. Serbian residents, otherwise a customs violation would be in evidence.