During more than five years as a housekeeper at the Trump National Golf Club in Bedminster, N.J., Victorina Morales has made Donald J. Trump’s bed, cleaned his toilet and dusted his crystal golf trophies. When he visited as president, she was directed to wear a pin in the shape of the American flag adorned with a Secret Service logo.

Because of the “outstanding” support she has provided during Mr. Trump’s visits, Ms. Morales in July was given a certificate from the White House Communications Agency inscribed with her name.

Quite an achievement for an undocumented immigrant housekeeper.

Ms. Morales’s journey from cultivating corn in rural Guatemala to fluffing pillows at an exclusive golf resort took her from the southwest border, where she said she crossed illegally in 1999, to the horse country of New Jersey, where she was hired at the Trump property in 2013 with documents she said were phony.

She said she was not the only worker at the club who was in the country illegally.