 Since Estonia's accession to the European Union (EU) in 2004, Estonian citizens who possess an Estonian identity card have been able to use it as an international travel document, in lieu of a passport, for travel within European Economic Area (except Belarus, Russia, and Ukraine) as well as French overseas departments and territories, Andorra, San Marino, Monaco, Vatican State, Northern Cyprus and Georgia.However, non-Estonian citizens resident in Estonia are unable to use their Estonian identity cards as an international travel document.In August 2017, a security threat was discovered that affected 750,000 ID and e-residency cards issued between 16 October 2014 and 26 October 2017.