Upon default of payment of any installment of this note or in the event the money borrowed on this note is not used for the purpose set forth in this application or in case of misrepresentation or misstatement made by the borrower or co-maker in obtaining this loan or in case the holder shall deem the security thereof unsafe for any reason whatsoever then this note, or so much hereof as may remain unpaid, shall at the option of the holder immediately become due and payable. In the event of default the maker or makers hereof pledge any shares now or hereafter held by them in the society as Additional security for the payment of this obligation, and we hereby authorize the Treasurer to apply any or all such shares, or payment on shares, to the payment of this loan, interest ,costs or expenses.