Jemstvenik

Jemstvenik (Serbian Cyrillic: јемственик) or jamstvenik (Croatian, Slovene), is a string made of red, blue and white strands that is used to tie together official documents, and for similar purposes, in countries of former Yugoslavia, in a similar way to red tape in some common law countries.

[1] It was later used in Yugoslavia, Croatia and Slovenia (though their flags have different color order, the same string fits all).

Bosnia and Herzegovina and Montenegro still use the red-blue-white jemstvenik despite changing the flag colors.

In North Macedonia, the string is called emstvenik (Macedonian: емственик)[2] and has the red-yellow colors of the flag of North Macedonia.

[2] The term comes from the word "jemstvo"/"jamstvo" which means warranty.