Short term AirBnB rentals are technically illegal in Thailand because they are operating as a hotel without a hotel license. Most AirBnBs do not want to file a TM30. Hotels, on the other hand, generally always file a TM30.
IF the AirBnB owner is in Thailand, they can submit the TM30 online. I believe the Android application works best.
Online [best option]:
**********************************************
Apple:
****************************************************
**********
*****
*****
Android
*************************************************************************
If they are in Thailand, you can send them this video
************************************************************