I read of a related problem either in a IRS publication or a Tax book like CCH.
Someone claiming a 'vacation home' gave the use of a week to his church. Since the week was not a charitable deduction it was considered 'personal use.' It changed the number of days requiredfor the 'vacation home' home and thus the IRS disallowed his 'vacation home' deduction that year.
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Vacation Internationale sends forms where you can allow points that expire to automatically be given to charities. Sounds like an incentive not to be concerned with points expiring. I met people who purchased VI vacations at charity auctions. I think VI and other resorts just want 'fresh people' in to sell them a TS. I don't understand why their literature makes it sound like we can deduct the value of those points as a charitable donation. I agree with you that they are not deductible.