Is a TM30 required for visa extensions in Thailand?

A user recently reported obtaining a 1-month visa extension at Bangkok Immigration without being asked for a TM30 form, which led to confusion about its necessity. Comments clarified that the TM30 is not required for short-term extensions like the 30-day visa exempt and 60-day tourist visas, but may be necessary for long-term visa extensions, particularly for Non-O visas. The conversation emphasizes varying local practices and updates regarding immigration requirements.