The UK Border Agency has said it is taking action to deport five illegal workers caught during raids on businesses in Stamford, Lincolnshire.
Two Bangladeshi men who had illegally entered the UK were found at the Saffron Lounge restaurant on Main Road.
Two failed Vietnamese asylum seekers - a man and woman - were caught at The Lounge Nail Bar on St Mary's Street, along with a male illegal immigrant.
Both firms were issued with spot fines after the raids at the end of March.
Between 1 April 2010 and 31 March 2011 the agency found 73 illegal workers at 39 businesses across Lincolnshire.