(6) Despite subsection (4) or (5), a company, and, in the case of debentures, the trustee of the covering trust deed, is not bound or entitled to treat the transferee of shares or debentures as the owner of them until the transfer to him or her has been registered or until the court orders the registration of the transfer to him or her; and until the transfer is presented to the company for registration, the company is not to be treated as having notice of the transferee's interest thereunder or of the fact that the transfer has been made.