The posting of workers between Member States of the EU has increased dramatically over the past decade. It has led to political and legal discussions on the employment and social rights of these workers during their temporary employment in the host Member State. As far as social security is concerned, these workers remain subject to the social security system of the sending Member State, provided that a number of conditions are fulfilled.
[---] This article takes a closer look at the role of these certificates. It the analyses and discusses the case law on this and formulates some critical comments on it.