I'm sure this has been asked before, so I apologize in advance as I couldn't locate the answer. I bought and used a book in March of this year -- to great effect. I gave the remaining coupons to someone as I left town. I'm going back on an unexpected trip in early Dec. I'm wondering if some offers are only valid once a year? For example, if I used a free play coupon at a casino, can/will they deny me if I return less than 12 months later?