Examinations are certified by are variety of institutions such as:
Royal Irish Academy of Music
Leinster School of Music
Registry of Guitar Tutors
The Associated Board Royal School of Music
See links to view more information on each organization
Exams are completely optional. It is up to the student to decide if they are learning purely for pleasure or if they would like to partake in exams. The opportunity is always available.
Preparing for exams will help the student develop all aspects of their playing in a structured way. It provides motivation to increase their knowledge of techniques and music theory.
It is beneficial to find out via a reliable and independent assessment the students' standard of playing and what they may need to improve on.