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Non O-A one year multiple entries visa gives you possibility to stay for up to two years in Thailand. The main requirements are the same as the regular 90 days Non O visa, but there’s a mandatory health insurance, health certificate and a police check up as well. This visa you’ll have to apply for every second year at your embassy consulate at home. If you want to stay more permanent in Thailand it’s most convenient to apply for a 90 days Non O visa and do yearly extension of stays with multiple re-entry permits.