15 Pa.C.S. § 1769

(a) General rule.--A business corporation may treat a minor who holds shares or obligations of the corporation as having capacity to receive and to empower others to receive dividends, interest, principal and other payments or distributions, to vote or express consent or dissent and to make elections and exercise rights relating to such shares or obligations unless, in the case of payments or distributions on shares, the corporate officer responsible for maintaining the list of shareholders or the transfer agent of the corporation or, in the case of payments or distributions on obligations, the treasurer or paying officer or agent has received written notice that the holder is a minor.

(b) Disaffirmance limited.--A minor who holds shares or obligations of a corporation and who has received or who has empowered others to receive dividends, interest, principal and other payments or distributions, voted or expressed consent or dissent or made an election or exercised a right relating to the shares or obligations shall have no right thereafter to disaffirm or avoid, as against the corporation, any such act on his part.

(c) Other statutes unaffected.--This section does not limit any other statute that authorizes any corporation to deal with a minor or limits the right of a minor to disaffirm his acts.