Email goldpassport@hyatt.com with a recent hotel statement from one of these programs: IHG Platinum Elite Marriot Platinum Elite Hilton Diamond Starwood Preferred Guest Platinum Your HGP # is the subject line along with Promo Code: DIA14. Make sure to type in Exp. Date 02/28/2016 in the subject line. After accepting the 60-day Diamond Challenge, call the Diamond hotline at 1-800-400-2261 to update your account and request a Diamond membership card.