immigration services means any service purporting to aid any person in any immigration matter involving the United States government, such as by: (a) appearing in any immigration case, either in person or through the preparation or filing of any brief, paper, application, petition, form, or other document, on behalf ofimmigration services means any service purporting to aid any person in any immigration matter involving the United States government, such as by: (a) appearing in any immigration case, either in person or through the preparation or filing of any brief, paper, application, petition, form, or other document, on behalf ofimmigration services means any service purporting to aid any person in any immigration matter involving the United States government, such as by: (a) appearing in any immigration case, either in person or through the preparation or filing of any brief, paper, application, petition, form, or other document, on behalf ofimmigration services means any service purporting to aid any person in any immigration matter involving the United States government, such as by: (a) appearing in any immigration case, either in person or through the preparation or filing of any brief, paper, application, petition, form, or other document, on behalf of