Elizabeth George - Director of Member Engagement & Chapter Development AGO Service Playing Certificate The American Guild of Organists offers the AGO Service Playing Certificate (SPC) . It is widely recognized as a demonstration of proficiency at the organ. Earned through a practical examination, it is a professional credential you can achieve at a fraction of the cost of academic credit at a school or university. This SPC exam can be taken at a local AGO chapter through March 31, 2020....