While there is no set international standard for what constitutes a TEFL (Teaching English as a Foreign Language) Certification course, most countries will have requirements that schools must meet before handing out certificates.
Sometimes the review is only cursory, but sometimes it may also be detailed and require certain content for the course and even the qualifications of the teachers.
Here is a short list of questions about your school and its TEFL Certification course:
Is the school licensed by the Ministry of Education or local education office or just by a business licensing agency of the local government?
This should tell you something about the rigor of the evaluation of the school by their government.