What are the requirements for renewing a Non-O visa at Jomtien Immigration?

Inquiring about the requirements for renewing a Non-O visa at Jomtien Immigration brought up various responses from the community. It's important to clarify that the process is termed as applying for an extension rather than a renewal. Key requirements mentioned include bank statements confirming a balance of 800,000 THB (if applying based on retirement), a passport copy with all used pages, a passport photo, a TM30 form, and a certificate of residence. The bank letter must be recent, ideally dated the same day as the application. Participants noted the varying requirements for different types of Non-O visas and emphasized the importance of using precise terminology when dealing with immigration to avoid confusion.