All demands, notices and communications hereunder shall be in writing and shall be deemed to have been duly given if personally delivered to or mailed, by registered mail, postage prepaid, by overnight mail or courier service, or transmitted by facsimile and confirmed by similar mailed writing, if to the Buyer, addressed to the Buyer at 60 Wall Street, 3 rd  Floor, New York, New York 10005, Attention: Timur Otunchiev, or such other address as may be designated by the Buyer to the Guarantor in writing, or, if to the Guarantor, addressed to the Guarantor at 1140 Avenue of Americas, 7th Floor, New York, NY 10036, Attention: Rick Herbst, Email: rherbst@waterfallam.com, Facsimile: 212-257-4699, or such other address as may be designated by the Guarantor to the Buyer in writing.