Otherwise known as the United States Patent and Trademark Office, or USPTO, this is the administrative body in the United States that oversees the registration and cancellation of trademarks on the Principal andSupplemental Register, as well as patents. Only attorneys can represent other parties before the USPTO, although individuals can represent their own companies. For trademark law, there is no special certification or license required for attorneys to practice before the USPTO. Trademark applications and all other correspondence should be addressed to "The Assistant Commissioner for Trademarks, 2900 Crystal Drive, Arlington, Virginia 22202-3513." Initial trademark applications should be directed to "Box NEW APP / FEE," while amendments to allege use should be directed to "Attn. AAU," and statements alleging use or requests for an extension of time to file a statement of use should be directed to "Box ITU / FEE."