The following applies to persons who want to work within the EU: the country of origin remains responsible for social insurance for temporary work up to 24 months in another EU Member State. The underlying principle is that of a temporary posting abroad.

The E-Form A1 must be completed in advance.
People may also be posted to countries outside of the European Union. Specific forms exist in many cases as well. Employed persons may be posted by their employer, self-employed persons may post themselves.