Certification is the process of certifying that a participant is eligible to receive a benefit. For example, a disability benefit product might require that a doctor certify a participant's inability to work once a year, in order to ensure that the participant still meets the eligibility criteria for the disability benefit. The Certification Required setting can be used to indicate whether or not the product requires some form of certification for eligibility determination. For products that are configured to be non-certifiable, no certifications may be recorded within cases based on the product. This setting is not directly used in any eligibility determination processing OOTB; however, it can be used, for example, within a customized rule set for determining client eligibility. If the Certification Required setting is enabled, a Certification Frequency must be specified.