CityMD, which has 150 locations in New Jersey and New York, said it was hoping to preserve its staff levels by temporarily closing a number of sites, days before Christmas.
Three New Jersey men were among nine people facing charges in the scheme involving dealerships across the state. Also scammed was a boat and two jet skis.
Employees who do not comply by the deadline will not be able to work and their pay suspended. They'll be given another 15 days to show proof of the COVID-19 vaccination or their employment will be terminated.