If you are an expert in the certification domain with many years of
industrial experience, and you have mastered all of the knowledge and
skills stated in the certification blueprint, you may apply to be
grandfathered into the certification. Grandfathering refers to the
exemption of attempting the certification exam.
You will need to submit proof to back your industrial experience, and must recommend at least 2 verifiers to vouch the same. One of the verifiers must be your current/former immediate supervisor.
The current certification that is open for grandfathering is Certified Digital Marketer (CDM). Please visit the CDM certification webpage for more details.