There are two broad types of agency, each with different characteristics and raising different issues.
Last week, after the decision of Member States to introduce a visa-free regime for Albania and Bosnia-Herzegovina, EU Commissioner Cecilia Malmström visited the two capitals on Friday to talk about the new regime.
Cecilia Malmström visited Tirana and Sarajevo together with Belgium's Minister for Migration Mr Melchior Wathelet. They met with politicians, students, and businesses, and discussed the consequences of the new visa-free regime.
"It is amazing how much this mean to the people of Bosnia-Herzegovina and Albania. It was moving to hear the students tell us about how they have struggled with visa bureaucracy to be able to visit friends in Europe, and to see their joy of not having to go through that anymore", said Cecilia Malmström after her visit.
Read more about the new visa-free regime.