Introduction This publication is for withholding agents who pay income to foreign persons, including nonresident aliens, foreign corporations, foreign partnerships, foreign trusts, foreign estates, foreign governments, and international organizations. Specifically, it describes the persons responsible for withholding (withholding agents), the types of income subject to withholding, and the information return and tax return filing obligations of withholding agents. In addition to discussing the rules that apply generally to payments of U.S. source income to foreign persons, it also contains sections on the withholding that applies to the disposition of U.S. real property interests and the withholding by partnerships on income effectively connected with the active conduct of a U.S. trade or business. Comments and suggestions. We welcome your comments about this publication and your suggestions for future editions. You can e-mail us while visiting our web site at www.irs.gov. You can write to us at the following address: Internal Revenue Service Technical Publications Branch W:CAR:MP:FP:P 1111 Constitution Ave. NW Washington, DC 20224 We respond to many letters by telephone. Therefore, it would be helpful if you would include your daytime phone number, including the area code, in your correspondence.