My wife and I (both photographers) have volunteered to provide photographic coverage of a fund-raiser event for a local non-profit performing arts company. The event is a charity dinner, silent auction, performance, with about 200-300 people expected to attend. I expect to give them rights to use some images on their website (and perhaps in brochures, etc.) to promote future events. In return, I'll be listed as a sponsor in the program, and I'll ask for photo credits on any usage. Can anyone make recommendations as to what written agreements should be made up? Also, what documentation do I need in order to establish the value for tax-deductible benefits? Are services even tax- deductible? I suppose I could give them a standard contract, then do a 100% discount, but I don't want to turn them off with a lot of legal mumbo-jumbo. I will, however, be specific with any usage rights agreements that arise from the resulting photographs. Anyone ever done something like this before?