European Union member countries have begun rolling out a new entry and exit system at the bloc's external borders, electronically registering non-EU nationals' data.
The Entry/Exit System (EES), an automated system that requires travellers to register at the border by scanning their passport and having their fingerprints and photograph taken, will be introduced over six months.
The move is aimed at detecting overstayers, tackling identity fraud and preventing illegal migration amid political pressure in some EU countries to take a tougher stance.
"The Entry/Exit System is the digital backbone of our new common European migration and asylum framework," European Internal Affairs and Migration Commissioner Magnus Brunner said in a statement on Sunday.
Non-EU citizens will have to register