Sajic has successfully represented the Krajina Osiguranje Banja Luka insurance company against a claim of unjust enrichment brought against the company by RK BOSKA Banja Luka worth EUR 3.2 million.
On April 4, 2018, the Banja Luka District Commercial Court rejected RK BOSKA Banja Luka's arguments and found for Krajina Osiguranje Banja Luka.