Sometimes, they (US-based employers) just turn off badges and ghost employees without telling them. Employee shows up to work and wonders why they can't get on

Sometimes, they (US-based employers) just turn off badges and ghost employees without telling them. Employee shows up to work and wonders why they can't get on the elevator. They've been fired, but no one told them. Happens more so with extra-corporate-y US corporations who are more social Darwinian than most.