For eight years, it seemed to Margarita Cruz that the management at the Trump Organization’s golf club in Westchester County, N.Y., did not notice — or did not care — that the green card and Social Security card she had used to get hired were fake, purchased in Queens for about $120.

Ms. Cruz, a housekeeper, said she cleaned guest rooms, offices and shops at the club. She laundered sheets and pool towels. But that all ended this month, she said.

Ms. Cruz and about a dozen other employees — housekeepers, landscapers and a head chef — at the club, Trump National Golf Club, were fired Jan. 18 because they were in the country illegally, according to interviews with Ms. Cruz and the former workers’ lawyer.

The firings were first reported on Saturday by The Washington Post.

The New York Times reported in December that undocumented immigrants had been employed at another club owned by the Trump Organization, the Trump National Golf Club in Bedminster, N.J., and that they were kept on the payroll for years even though management there had some knowledge of their fraudulent papers.