Also check where the charity is located. Some don't go to the reservations at all, but are out of post office boxes in places like New York City. Last year there was a photo of a run-down trailer going around Facebook, with the scammers claiming it was the home of a particular Native family they were helping. One of my friends, who knows the named family, saw the photo and contacted the family... it was not their home, and this family had never heard of the charity, let alone received any money from them. People should ask for names and references and find a way to make sure any money or supplies are going to the people they say they're going to.