Start with citizenship and destination
Your requirements depend on nationality, current residence, destination, duration and placement type. Europe, the EU and the Schengen area are different groupings.
Check the right to intern
EU citizens generally have free-movement rights in other EU countries, subject to applicable conditions. Non-EU citizens should verify the destination’s internship and residence route. A Schengen visitor permission is not proof of a right to intern.
Check registration and healthcare
Ask the destination authority about local registration and your insurer about healthcare abroad. Where eligible, the EHIC concerns necessary state healthcare during a temporary stay; it does not replace comprehensive travel cover.
Confirm placement cover
Check accident, personal liability and professional liability arrangements with the institution and host. Ask explicitly whether your actual work activities are covered.
Source / further reading: https://europa.eu/youreurope/citizens/education/traineeships/index_en.htm
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