When SMI is terminated erroneously, an individual is in approximately the same position
            as the person whose enrollment was not processed timely. That is, the individual does
            not know whether they still has SMI. Thus, they may enroll in other health insurance
            to ensure some protection against medical expenses, or may defer necessary treatment
            because of uncertainty about being insured against the costs of such treatment, etc.
         
         When the error is finally corrected, it would be unfair to reinstate SMI entitlement
            retroactively, which would require the individual to pay premiums for past SMI coverage
            that they were unable to use at that time.