Quick answerKeep the newborn in the room until the person's identity is verified.
Why this is correctA missing unit badge is the finding that matters, because badge verification is the control that stands between a newborn and an unauthorized transfer. Verification is quick, and nothing is lost by completing it before the infant moves.
Easy analogy or mental pictureIt is the same as checking a courier's credentials before handing over a package. The comparison covers verification and does not imply the person is accused of anything.
Memory hookNo badge means the newborn does not leave the room.NCLEX decision ruleTransfer a newborn only to staff identified by unit badge and known process. Verify first, and involve security when verification fails rather than after the infant has left.
Why the other choices are wrongAsking about the order, escorting to the nursery, and calling security later are all reasonable-sounding steps, yet each one lets the newborn leave the room before identity is confirmed.