Over half a million federally recognized charities solicit for contributions. Most are legitimate, but not all. A legitimate charity sends information about its mission, how your donation will be used, and proof that your contribution is tax-deductible. The problem: some phony charities use names that sound or look like those of respected organizations. Check with groups like the Philanthropic Advisory Service (703) 276-0110. The Better Business Bureau's Wise Giving Alliance is a good resource to help consumers distinguish organizations from one another and also how donations are used. You may contact the BBB's Charitable division at www.give.org or (212) 929-6300. Another resource on national charities includes www.guidestar.org.