Employers who have sponsored employees for H-1B temporary work visas should be prepared for a potential visit from United States Citizenship and Immigration Services (USCIS) to the worksite of their H-1B employees. This resource provides background on such worksite visits, information about a recent policy update, recommendations for employers who may be new to sponsoring H-1Bs, and information specific to California and to sensitive work locations such as schools. Schools should consider separate (though potentially overlapping) policies for responding to an H-1B worksite visit and an ICE enforcement action. This may include guidance for staff on how to recognize the difference between an ICE enforcement action and an H-1B worksite visit.