Tax-exempt organizations, by definition, are exempt from federal income tax under various provisions of the Internal Revenue Code. However, some are directly involved in abusive tax avoidance transactions (ATATs). In addition, because they are tax-indifferent, tax-exempt organizations are, at times, used by for-profit entities as accommodation parties in these transactions. Identifying and responding to ATATs involving tax-exempt organizations is critical to the IRS objective of discouraging and deterring non-compliance within tax-exempt and government entities. Former Commissioner Everson emphasized this in a hearing conducted by the Committee on Finance, U.S. Senate on Charitable Giving Problems and Best Practices. Additional information Abusive transactions Report an Abusive Transaction Involving an Exempt Organization You may use Form 13909 PDF, Tax-Exempt Organization Complaint (Referral) Form, to report an abusive transaction involving an exempt organization. To send a written complaint by mail, send to the following address: IRS EO Referrals MC 4910DAL 1100 Commerce Street Dallas, TX 75242 In addition, the IRS Office of Tax Shelter Analysis maintains a hotline that can be used to provide information about abusive tax shelters.