Business trips are associated with special difficulties in times of COVID-19. This does not only apply to the practical problems of implementation, for example due to restricted travel options or special regulations for entry and quarantine. One special regulation that many countries have adapted is an entry declaration prior to travel.

In its decision of 02.04.2020, the ECJ held that Regulation EC 647/2005 must be interpreted as meaning that the courts of a Member State, which are involved in legal proceedings against an employer who has fraudulently obtained or used E101 or A1 certificates issued to employees working in the Member State,