Do I need to file a TM30 for my non-O visa extension in Thailand and whose responsibility is it?

And this goes into another useless discussion. A user say very easy and convenient and the next is my landlord applied and it's very slow, he did not get the username and password yet. You need to make the reports, you can do it at the Immigration Office but as you are in Bangkok prepare yourself as it is busy, or you can do it on-line or with the app but it take some time to get the username and password, after that it is easy and convenient.

If you want to extend your visa, the immigration officer will want to see a receipt of your TM30 filing...so the answer is Yes. The landlord is responsible for filing this and should be fined if they don't. However, in reality, if you go to Immigration to extend your visa and don't have your TM30 receipt, you will likely be told to go to another window and file your own TM30 form, then come back with the receipt to process your visa extension. In this case, you will be the one paying the 800thb fine. Note that you can self-file this form with Chaeng Wattana, and you can find detailed instructions if you search this group.