UPS Fires 280, Some US Citizens - New America Media The United Parcel Service fired 280 workers after verifying their legal status to work in the country, but not all of them were undocumented immigrants, reported La Raza. The Teamster's union said the company was using E-verify, a federal program that allows employers to match a worker’s name with her or his Social Security number to check eligibility to work. Since 2009, the federal government implemented a new rule that amended the Federal Acquisition Regulation (FAR), making it mandatory for any company that has a contract with the federal government to use this system. Modifications to the regulations also required employers to conduct checks on current employees, not just new hires. UPS told La Raza that they re-verified about 340,000 workers across the country. UPS spokesperson Norman Black said that employees who didn’t pass the E-verify check will have to present proper documentation to show they can work to clarify the situation in cases were they change their name, for example.