An application under Title II covers all classes of Title II benefits described in
            sections 202(a) through 202(l) and 223 of the Social Security Act for which the claimant is eligible. Also, a claimant may
            be "deemed" to have filed an application for both RIB and spouse's benefits when eligibility
            for both benefits exists (see GN 00204.035). Therefore, we must explore entitlement to RIB whenever a claimant files an application
            for spouse’s benefits.
         
         When you take an application, the Modernized Claims System (MCS) performs various
            checks against information contained in our records to verify the identity of the
            claimant and to determine if they meet all entitlement factors. After you make a formal
            initial determination, the claimant receives a notice that includes appeal rights.
            All of these safeguards protect the claimant's rights to benefits. Therefore, you
            must obtain and review a certified earnings record (e.g., Informational/Certified
            Earnings Record System or ICERS) to determine insured status (I/S).