In Thailand a TEFL certificate is now necessary even if you already have a degree. TEFL course will give you a lot more confidence standing in front of a group of people and it will you give you an insight into teaching methodology but it will not turn you into a teacher. In the current scenario therefore, the basic qualification for teaching English is an undergraduate degree in any subject, plus a TESL / TEFL / TESOL certificate. There are numerous organisations that issue certificates which vary widely in acceptance. In the parts of the world influenced by Britain (the Commonwealth and the European Union), the two most commonly recognized certificates are the UCLES CELTA and the Trinity CertTESOL. Some universities issue TEFL certificates as part of their undergraduate program. The typical United States qualification is a pre-service MA TESOL, although many shorter certificates exist.