Social insurance voluntary coverage established by clear conduct and declaration without formal renewal request.

The Supreme Court dismissed the cassation appeal against a decision denying the insured's claim for refund of overpaid social insurance contributions. The insured had clearly expressed her will to remain voluntarily insured through continuous payment of contributions and a formal declaration in 1999, despite not submitting a specific request to continue coverage after her husband's death. The court ruled that such explicit conduct and declaration were sufficient to establish the insurance relationship, rendering a formal renewal request unnecessary.