Donating to charity is an act of faith in the possibility of a better world—that’s why every dollar counts. And with the holiday giving season approaching, you may be receiving more requests from nonprofits and starting to think about the causes you want to support. According to the National Center for Charitable Statistics, the U.S. is home to more than 1.5 million nonprofit organizations. With so many to choose from, how do you decide which ones to support?

Whether you’re researching organizations or already have some in mind, here are 10 key questions to ask when evaluating a nonprofit.