I have a dog forum. And each year I make a calendar for the members using photos they choose of their dogs in my cafepress store. They also know that the calendars will be for public sale. This has never been a problem until an ex member suddenly decided to make a complaint about their dog's picture being in the calendars. I know now that I need a realease form from each person. My question is this; will an electronic form with an electronic signature be ok? My members are from around the world. Thanks for any advice.