When you are not a bachelor's degree graduate, or you are, but you want to enter the M.A. program later, or you are simply anyone interested in taking a course for a certificate (regardless of educational level, age, status,  or career), you can take the program's courses at the same time as full-time students. See a teaching schedule of  block courses  here.  To enroll in the courses, you must pay a fee of 6,000 THB each.

If you want to claim the courses as part of the Master's program, you need to register as a "life-long learner,"  pay another 500 THB, and the course credits will be collected in the university's credit bank system. 

All of the non-credit foundation courses can be transferred to the program (four courses altogether). You can also collect credits from the the other two categories: compulsory and elective. The credits collected cannot be more than one-third of the taught course credits, excluding the 36 or 12 credits for a thesis and the 6 credits for an independent study (IS).  See the program structures here. If you take program structure B, for example, you can transfer  all four foundation courses plus three more courses from the compulsory or elective categories. 

You can fill out the application form for the available options through the link provided on the Home page.

In the case of certificates, you can choose to have a certificate of completion for each of the single courses or a group of courses offered in each semester.