So, I went to Samat Prakan Immigration Office to get a 30-day extension (necessary so that I can renew my US passport), and I was given the "Notification Form For House-Master, Owner or Possessor of the Residence Where Alien Has Stayed." I brought this back to my small hotel, and was eventually put in contact with the owner via phone. He said sorry, cannot help. I presume that I now need to change residence and have new house-master or owner fill out this form then go back to immigration?