Census workers will be in the field from May 1 through July 10 conducting interviews with residents of addresses from which a form was not received. If no one answers at a particular residence, a census taker will visit a home up to three times and attempt to reach the household by phone three times. The census worker will leave a double-sided (English and Spanish) NOTICE of VISIT in the doorway that includes a phone number for the resident to schedule an appointment. How Do I Identify A Census Worker?