The government in Priština this week introduced a ten-percent tax on goods coming from Bosnia-Herzegovina, prompting this country to react.
Sarajevo said it would file a complaint with the regional free trade organization CEFTA.
The UN mission in Kosovo, UNMIK, joined CEFTA on behalf of Kosovo, and the territory can sell its goods to Serbia and Bosnia under this arrangement.
But the problem occurred when the Kosovo Albanian authorities attempted to stamp the documents accompanying the goods with the stamp of Kosovo.
Serbia and Bosnia do not recognize the unilateral declaration of independence, and therefore cannot accept the Kosovo customs stamps.