FYI Mahasarakham provice residents
Re : TM30
As I am heading to BKK for 2 nights, staying in a hotel. I thought it prudent to ask the IOs at Mahasarakham if I needed to submit a TM30 upon my return.
Their answer was; As long I stay inside Thailand and return to my registered address, there is NO need to submit a new TM30.