What should I expect when arriving in Bangkok with a retirement OA visa?

When arriving in Bangkok with a retirement OA visa, you should use the normal visa immigration line, specifically the 'foreigner arrivals area'. There is no separate line for the OA visa unless you are over 70 years old, in which case a specific line is available. It's important to present your e-visa along with your passport and any necessary documentation, such as proof of mandatory insurance that is valid for up to a year. Also, do check the stamp on your passport before leaving the immigration area.