@Adam *******
and I suggest you ask your local Thai Immigration office for their list of requirements for the 30 days extension.
There are over 80 offices nationwide.
The list of requirements which I have shared with you is what you can expect to see.
The TM30 is required...you might disagree...but the Thai Immigration offices are now requiring it.
The application is simple and easy to get the 30 days extension of stay IF YOU have a TM30 on file with the Thai Immigration office.