A model O-1 or O-2 nonimmigrant visa petition support letter. This letter is used by employers to support petitions to US Citizenship and Immigration Services (USCIS) for O-1 individuals of extraordinary ability in the sciences, education, business, athletics, or the arts, or individuals of extraordinary achievement in motion pictures or television, or O-2 essential support personnel for an artistic or athletic endeavor. This Standard Document has integrated notes with important explanations and drafting tips.