Hiring is the most heavily regulated conversation most employers ever have, and the rules govern what may be asked, what may be checked, what may be relied on, and what must be told to the applicant afterward. This article explains the two theories of discrimination that shape every screening decision, the questions that create liability regardless of intent, and the accommodation obligations that arise before anyone is hired. It covers background checks end to end, including the standalone disclosure requirement, the pre-adverse action pause, and the individualized assessment that criminal history screening requires. It addresses employment verification, salary history and pay transparency rules, drug and medical testing, and reference practices that expose the former employer. Examples follow one job opening through a lawful and an unlawful version of the same process. Readers finish knowing what to ask, what to document, and where the recurring violations are.