In a statement published on Twitter she said she had followed immigration laws "at all times"
Republican presidential nominee Donald Trump's wife Melania Trump has rejected accusations that she breached visa rules when she started working as a model in the US.
Mrs Trump has yet to clarify what type of visa she had during a photo shoot in New York in 1995.
Donald Trump has made illegal immigration a signature plank in his campaign platform.
His wife has often cited her path to US citizenship in defence of his hard line, saying she came to the US legally.
She said other aspiring Americans should follow her example.
But questions have been raised about Mrs Trump' visa status after apparent discrepancies emerging from a nude photoshoot.
Mrs Trump said she began working as a model in America in 1996.
But nude photos were published at the weekend by a New York tabloid - apparently taken for a now defunct French magazine in 1995.
The Trump campaign has refused to say exactly which visas Mrs Trump had, and when she had them.
But Mrs Trump released a firmly worded statement on Twitter denying she broke any rules.
She said: "I have at all times been in full compliance with the immigration laws of this country. Period. Any allegation to the contrary is simply untrue."
Melania Trump's former modeling agent Paolo Zampolli says she obtained a work visa before she modeled professionally in the US in the mid-1990s.
The development comes during a especially challenging week for Mr Trump.
There are reports of deep divisions in the Republican Party after a series of controversial statements by the nominee.