15 Pa.C.S. § 7525
(b) Redemption or conversion.— In the event a holder of common shares has done no business with an association for a period of 12 months or in the event the board of directors of an association finds that any of the common shares has come into the hands of any person who is not eligible for membership or that the holder thereof has ceased to be an eligible member, the holder shall have no rights or privileges on account of the shares or vote or voice in the management or the affairs of the association (other than the right to participate in accordance with law in case of dissolution and to receive the book or par value of the shares, whichever is less, in the event of its sale or transfer as provided in this subsection), and the association shall have the right at its option:
(3) to require the holder of any such shares to convert the shares into preferred shares of equal value.
In exercising its right to redeem or to require the transfer or conversion of shares, if the holder fails to deliver the certificate evidencing the shares for cancellation or transfer, an association may cancel the certificate on its books and issue a new certificate for common or preferred shares, as the case may be, to the party entitled thereto.