There is no Consulate of the Republic of Belarus in Northern Cyprus. What to do if one needs to change an internal or international passport? One has to go to Turkey.
The nearest to Northern Cyprus Belarusian Consulate General operates in Istanbul.
Consulate website address: istanbul.mfa.gov.by.
There is also the embassy in Ankara.
At the embassy or consulate, one can exchange a passport only if it is of the PP series or prolong a valid passport for two years.