What to know in practice
The term does not describe one uniform system across countries. Check current official rules for the specific destination and understand any written employment or sponsorship conditions.
Ask the employer to explain relevant arrangements in writing and seek qualified advice if you need help interpreting obligations or rights.
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Useful pages and guides
This glossary is general information, not legal or immigration advice. Requirements vary; check current official sources. Never pay anyone for a promised job or visa.
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