jock, the museum is an irs approved charity. in the past 45 years of itemizing deductions, i have never had the irs question dues paid to an irs approved charity. i have had several issues with investments and real estate, however!!!!!! the museum provides a wonderful newsletter, but no discounts at the store and either no or just a tiny discount on rides. so while i dont presume to be an expert, i certainly would and do take my dues off my taxes. dale