Except as otherwise provided herein, all notices, requests, demands, consents, instructions or other communications to or upon the Company or Holder under this Note shall be in writing and mailed or delivered to each party to its address set forth in the Security Agreement (or to such other address as the recipient of any notice shall have notified the other in writing). All such notices and communications shall be effective (a) when sent by a commercially recognized means of overnight delivery providing confirmation of receipt, on the business day following the deposit with such service; (b) when mailed, by registered or certified mail, first class postage prepaid and addressed as aforesaid through the United States Postal Service, upon receipt; and (c) when delivered by hand, upon delivery.