Info Sharing: TM 30 online - Private property
Chiang rai immigration office advised that we can actually do it online for the TM 30 reporting, even though we are not hotel/guesthouse owners.
My wife (Thai house owner) actually done a registration on the website and I have made some screenshots, plus some labeling. Best to get a Thai (or if you can read Thai) do the registration as the "Fill-In" boxes are in Thai language.
An email with username + password will be sent to the registered email address about 2-3 working days, upon successful registration (we do not need to send any hard/soft copy of documents to the immigration office). First login, and you will be prompted to change to a new password. Once in the portal, you can click on the first subject on the left (as per the picture). As per the CNR office's advice, there will be no hardcopy receipt of a successful reporting. Users are encouraged to screenshot the successful reporting online and keep as proof of reporting.
Note: I have not done the acutal online reporting yet as I have done mine physically at the office when I entered the country. Will post the outcome next week when I can do a "live" run of the reporting.
TLDR : Answer Summary
A user shares their experience with TM 30 reporting in Thailand, stating that it is possible to register online, even for those who are not hotel or guesthouse owners. They explain that their Thai spouse completed the registration, noting the process involves filling out forms in Thai. Users receive a username and password via email after registration and are advised to keep a screenshot as proof of reporting. The user plans to test the online reporting process and will update with results.