Do you need a TM30 if you have a visa exemption in Thailand?

The TM30 filing is generally required for all foreigners upon arrival in Thailand, regardless of visa exemption status. While many may not strictly adhere to this requirement if they're not interacting with immigration or intending to extend their visa, it is important to note that if you leave Thailand and return, a new TM30 may be necessary as the previous one could be voided upon exiting.