The National Registry reserves the right to investigate recertification materials at any time from the certified EMS professional. In accordance with our accreditation requirements, the National Registry randomly audits a percentage of all applications submitted. Audits are performed year-round. Certified EMS professionals must retain verification of attendance of all education they acquire for at least three years. Failure to submit verification or documentation when audited will result in denial of eligibility to recertify or may result in a certification being revoked.