A Form G-28 must be file by an attorney or accredited representative appearing before the Department of Homeland Security in each case. Form G-28 must be completed and signed by the petitioner, applicant, or respondent in order to authorize his or her representation before United States Citizenship and Immigration Services (USCIS) and United States Customs Enforcement (ICE). A beneficiary of a petition is not a recognized party in a proceeding before USCIS and therefore not required to sign the Form G-28.

USCIS, CBP, or ICE will recognized the attorney or accredited representative indicated on Form G-28 until the conclusion of the matter for which it was entered. However, a new Form G-28 must be filed with the Administrative Appeals Office when filing an appeal to that office.

The attorney or accredited representative indicated on Form G-28 who seeks to withdraw his or her appearance in a proceeding before the Department of Homeland Security must file a written request with the appropriate office with jurisdiction over the pending matter. Further, any attorney or accredited representative who is appearing for a limited purpose at a proceeding and at the request of the attorney or accredited representative of record (pursuant to the Form G-28 in effect) must also file a Form G-28 even though his or her representation may be of limited scope.