Transfer shares of stock

Section 63 of the Corporation Code determines the validity of the transfer of shares through purchase, to wit:
Section 63. Certificate of stock and transfer of shares. – x x x Shares of stock so issued are personal property and may be transferred by delivery of the certificate or certificates indorsed by the owner or his attorney-in-fact or other person legally authorized to make the transfer. No transfer, however, shall be valid, except as between the parties, until the transfer is recorded in the books of the corporation showing the names of the parties to the transaction, the date of the transfer, the number of the certificate or certificates and the number of shares transferred.

No shares of stock against which the corporation holds any unpaid claim shall be transferable in the books of the corporation.
In this regard, the Supreme Court has instructed in Ponce v. Alsons Cement Corporation[1] that:
x x x [A] transfer of shares of stock not recorded in the stock and transfer book of the corporation is non-existent as far as the corporation is concerned. As between the corporation on the one hand, and its shareholders and third persons on the other, the corporation looks only to its books for the purpose of determining who its shareholders are. It is only when the transfer has been recorded in the stock and transfer book that a corporation may rightfully regard the transferee as one of its stockholders. From this time, the consequent obligation on the part of the corporation to recognize such rights as it is mandated by law to recognize arises.

Nonetheless, in Lanuza v. Court of Appeals,[2] the High Court has underscored that the STB is not the exclusive evidence of the matters and things that ordinarily are or should be written therein, for parol evidence may be admitted to supply omissions from the records, or to explain ambiguities, or to contradict such records, to wit:

x x x [A] stock and transfer book is the book which records the names and addresses of all stockholders arranged alphabetically, the installments paid and unpaid on all stock for which subscription has been made, and the date of payment thereof; a statement of every alienation, sale or transfer of stock made, the date thereof and by and to whom made; and such other entries as may be prescribed by law. A stock and transfer book is necessary as a measure of precaution, expediency and convenience since it provides the only certain and accurate method of establishing the various corporate acts and transactions and of showing the ownership of stock and like matters. However, a stock and transfer book, like other corporate books and records, is not in any sense a public record, and thus is not exclusive evidence of the matters and things which ordinarily are or should be written therein. In fact, it is generally held that the records and minutes of a corporation are not conclusive even against the corporation but are prima facie evidence only, and may be impeached or even contradicted by other competent evidence. Thus, parol evidence may be admitted to supply omissions in the records or explain ambiguities, or to contradict such records. (Emphasis supplied.)

[1] G.R. No. 139802, December 10, 2002. 

[2] G.R. No. 131394, March 28, 2005.