§ 222. Notice of meetings and adjourned meetings.

(b) Unless otherwise provided in this chapter, the written notice of any meeting shall be given not less than 10 nor more than 60 days before the date of the meeting to each stockholder entitled to vote at such meeting. If mailed, notice is given when deposited in the United States mail, postage prepaid, directed to the stockholder at such stockholder's address as it appears on the records of the corporation. An affidavit of the secretary or an assistant secretary or of the transfer agent or other agent of the corporation that the notice has been given shall, in the absence of fraud, be prima facie evidence of the facts stated therein.

 http://delcode.delaware.gov/title8/c001/sc07/index.shtml#TopOfPage

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