That’s the official legal guidance from the New York City Commission on Human Rights: The NYCHRL [New York City Human Rights Law] requires employers[, landlords, and all businesses and professionals] to use an [employee’s, tenant’s, customer’s, or client’s] preferred name, pronoun and title (e.g., Ms./Mrs.) regardless of the individual’s sex assigned at birth, anatomy, gender, medical history, appearance, or the sex indicated on the individual’s identification.