Professional Certification is an on-line examination provided by ADDA to establish a credentialing system based on an individual's competency level. The examinations are based on years of experience or training level. Examinations are Professional Level but are available to students. Examinations may be taken at any approved testing site or through a proctor approved by ADDA. Professional Certification through ADDA is a 3 year lifespan, from date of certification and requires renewal.