How long is the First Aider certification valid for? October 14, 2021 21:09 The Mental Health First Aid Certification is valid for three years from the date of certification. Related articles How does a First Aider get re-certified? How do I maintain my certification for single certification or dual certification (Adult OR Youth)? I will not be able to complete my three courses by my one-year anniversary date. May I request an extension? How do I get credit for the courses I've taught? How do I add a second Instructor certification (i.e., dual certification)?