File a Complaint against a Charity with the Better Business Bureau, using this form. GuideStar is a searchable database of more than 620,000 nonprofit organizations in the United States. IRS rules and deductibility of charitable contributions can be found at the Better Business Bureau. An unbiased survey of charities. Tax-Exempt Organizations for which the IRS permits deductible contributions are listed here.
Most state governments regulate charitable organizations.
Contact the appropriate state government agency to verify a charity's registration and to obtain financial information on a soliciting charity. Contact your local Better Business Bureau to find out whether a complaint has been lodged against a charity.