Immigration officers swooped on a nail salon in Dundee city centre.
The operation was carried out at the Perfect Nails branch on Union Street.
A man aged 42, from Vietnam, was discovered to be working unlawfully at the shop.
He had also entered the UK illegally.
He is now required to report to Immigration Enforcement on a regular basis while his case is progressed.
The raid in the City of Discovery happened hours after another immigration raid took place at a nail bar in Perth.
The Nail Icon branch in the Fair City’s South Street was visited by officers around 11.45am on Friday.
Staff checks there resulted in three Vietnamese men, ranging from ages 26 to 30, being found to have been working illegally.
All three of them had entered the UK unlawfully and are under obligation to report to Immigration Enforcement regularly while all of their cases are progressed.
Both businesses were handed referral notices with a warning of a financial penalty of up to £20,000 for each illegal worker found, unless the employer can demonstrate appropriate right-to-work document checks were carried out.
An example of such a check would be either looking at a passport or document from the Home Office confirming permission to work.