All notices, requests, demands and other communications under this Agreement shall be in writing and shall be deemed duly given (i) if delivered by hand and receipted for by the party addressee, on the date of such receipt, (ii) if mailed by domestic certified or registered mail with postage prepaid, on the third business day after the date postmarked, or (iii) mailed by reputable overnight courier and receipted for by the party addressee, on the date of such receipt. Addresses for notice to either party are as shown on the signature page of this Agreement, or as subsequently modified by written notice .