The boarder between Hungary and Serbia. This is were we officially checked out of the EU as Serbia is not a member country.
The procedures for checking out were pretty simple and strait forward. At Mohács ( the last town in Hungary on the Danube) we were called on the VHF and told to dock on the yellow pontoon. Once there I had to go in to the building with the ship's papers and passports. after seeing customs and police we could continue on our way. The procedure took no more than 30 minutes.