Commodity Futures Trading Commission Three Lafayette Centre 1155 21st Street, NW Washington, DC 20581. 202-418-5000 202-418-5521, fax 202-418-5428, TTY. Consumer Assistance and Complaints: Call Toll-Free 1-866-FON-CFTC (866-366-2382), or use the Tips and Complaints Form. Regional Offices The Industry Filings search tool provides access to information about, and submissions by, trading and clearing organizations such as designated contract markets (DCMs), swap execution facilities (SEFs), derivatives clearing organizations (DCOs), swap data repositories (SDRs), and non-U.S. organizations (with respect to offering products to U.S. Futures Commission Merchants (FCMs) Introducing Brokers (IBs) Commodity Pool Operators (CPOs) Commodity Trading Advisors (CTAs) Floor Brokers (FBs) Agricultural Trade Option Merchants (ATOMs) Intermediaries are generally required to register with the CFTC. Associated Persons (APs) also must register and their principals must be listed.