N.Y. Bus. Corp. Law § 606
Notice of meeting need not be given to any shareholder who submits a waiver of notice whether before or after the meeting. Waiver of notice may be written or electronic. If written, the waiver must be executed by the shareholder or the shareholder's authorized officer, director, employee or agent by signing such waiver or causing his or her signature to be affixed to such waiver by any reasonable means, including, but not limited to, facsimile signature. If electronic, the transmission of the waiver must either set forth or be submitted with information from which it can reasonably be determined that the transmission was authorized by the shareholder. The attendance of any shareholder at a meeting, in person or by proxy, without protesting prior to the conclusion of the meeting the lack of notice of such meeting, shall constitute a waiver of notice by such shareholder.
N.Y. Bus. Corp.Law § 606