A good way to show that the non-profit is a valid and registered 501c3 is by going to www.guidestar.com This website is a third party website that checks to make sure a non-profit is a legal entity. I like it because it helps those who are considering donating to make sure that their donations are going to a real organization. Please share this information. We run on donations alone and donors will receive a tax deduction letter from our organization.