# Certifications

Certifications are most often awarded by industry organizations and are based on assessments of skills and knowledge. Licenses may be managed by local government agencies.&#x20;

A certification can have an external ID for linking to off-chain data.&#x20;

Certifications have an expiration date, which allows for requiring professionals to renew their certifications.&#x20;

A certification will have defined requirements (courses). Each course is made up of a **Module** (subject) and **Credits** (hours). Once the professional has met all the requirements they will receive that certification.&#x20;