You must have been wondering what the role of the Representative is if you already have appointed a DPO.
If you are a foreign company, which does not have a registered office (nor branches or other establishments) in the Republic of Serbia, but are engaged in processing activities related to:
1) offering goods or services to individuals in the Republic of Serbia, whether or not the data subject is required to pay compensation for these goods or services;
2) monitoring the activities of data subjects, if the activities are carried out on the territory of the Republic of Serbia.
Then you must comply with the Law and appoint a Representative in the Republic of Serbia.
However, even if you meet these conditions, you will not be required to appoint a Representative if:
a) you are a public authority;
b) the data processing is occasional; it does not involve large scale processing of special categories of data or data relating to criminal convictions; and is unlikely to result in privacy intrusions. In practice, this exemption rarely applies.