On April 17, 2026, the Customs Administration of the Republic of Serbia was notified by email by the customs administration of the Republic of Bulgaria, by letter No. 32-118738 dated April 17, 2026, regarding the procedure for the entry of goods into the EU by road and rail using ICS2 Release 3.
In the aforementioned letter, the customs administration of the Republic of Bulgaria draws attention to the fact that, as of June 1, 2026, when goods are brought into the customs territory of the Union through the territory of the Republic of Bulgaria, an Entry Summary Declaration (ENS) must be lodged either through ICS2 alone or in combination with a transit declaration in NCTS Phase 6. Otherwise, the customs administration of the Republic of Bulgaria will neither accept nor process an ENS declaration lodged through ICS1.
We also hereby inform you that, according to unofficial information currently available to us, the Republic of Croatia and Montenegro will begin implementing NCTS Phase 6 OPT-IN on June 1, 2026, while Romania will begin implementing NCTS Phase 6 OPT-OUT on the same date.
We further remind you that the customs administration of Hungary began implementing NCTS Phase 6 OPT-OUT on February 18, 2026.
(Customs Administration Letter No. 002076381 2026 10521 005 003 460 125, dated April 22, 2026)
Customs Administration of the Republic of Serbia
Ministry of Finance