Is it easy to renew a Non O-A Retirement visa by myself or should I hire a visa agent?

The process of renewing a Non O-A Retirement visa is generally considered straightforward, with many users suggesting it can be done independently without the need for a visa agent. However, applicants must prepare specific documentation, such as mandatory health insurance from approved Thai carriers and a signed bank statement showing the required funds. While some find the process easy, others note that it can depend on individual circumstances and the local immigration office's specific requirements. Changing from a Non O-A visa to a Non O visa is not possible without leaving the country, which adds complexity for long-term residents.