Proof of financial responsibility may be evidenced by the certificate of the department that the person named therein has deposited with him or her sixty thousand dollars in cash, or securities such as may legally be purchased by savings banks or for trust funds of a market value of sixty thousand dollars. The department shall not accept any such deposit and issue a certificate therefor and the department shall not accept such certificate unless accompanied by evidence that there are no unsatisfied judgments of any character against the depositor in the county where the depositor resides.