Do I need to file TM 30 when traveling within Thailand?

The need to file a TM 30 when traveling within Thailand varies by immigration office. While the official rule states that re-filing is not necessary for domestic travel, some offices might still require it. For instance, the Samut Prakan office mentions that it's not needed for travels lasting 3-4 days, and the Bangkok office reportedly does not require a new filing if the traveler possesses the original TM 30 receipt. However, responses can vary based on individual officers, so it's advisable to check with your local immigration office.