Todd's recent response on TM30 suggests different immigration offices have different policies with respect to the need to file a TM30 for in-country travel. Does Chaeng Watthana (BKK Province) enforce TM30 reporting requirements for in-country travel? I would much prefer to file a TM30 only when I get a new TM6.
TLDR : Answer Summary
The TM30 filing requirements for in-country travel at Chaeng Watthana Immigration Office appear to be inconsistent, with different sources providing varying information. Some reports suggest that TM30 submissions are not necessary for in-country travels, while others state that they are obligatory. Users have shared their experiences with both app-based and postal submission methods for TM30 filings. Given these discrepancies, it's recommended to confirm the requirements directly with the immigration office to avoid penalties.