Melania Trump delivers a speech on the first day of the Republican National Convention on July 18, 2016 at the Quicken Loans Arena in Cleveland, Ohio.

Melania Trump was paid for 10 modeling jobs in the United States worth $20,056 that occurred in the seven weeks before she had legal permission to work in the country, according to detailed accounting ledgers, contracts and related documents from 20 years ago provided to The Associated Press.

The details of Mrs. Trump's early paid modeling work in the U.S. emerged in the final days of a bitter presidential campaign in which her husband, Donald Trump, has taken a hard line on immigration laws and those who violate them. Trump has proposed broader use of the government's E-verify system allowing employers to check whether job applicants are authorized to work.

Mrs. Trump, who received a green card in March 2001 and became a U.S. citizen in 2006, has always maintained that she arrived in the country legally and never violated the terms of her immigration status.

The wife of the GOP presidential nominee has said through an attorney that she first came to the U.S. from Slovenia on Aug. 27, 1996, on a B1/B2 visitor visa and then obtained an H-1B work visa on Oct. 18, 1996.

The documents obtained by the AP show she was paid for 10 modeling assignments between Sept. 10 and Oct. 15, during a time when her visa allowed her generally to be in the U.S. and look for work but not perform paid work in the country.

It is highly unlikely the discovery will affect the citizenship status of Mrs. Trump. The government can seek to revoke the U.S. citizenship of immigrants after the fact in cases when it determines a person willfully misrepresented or concealed facts relevant to his naturalization. But it effectively does this in only the most egregious cases, such as instances involving terrorism or war crimes.

The disclosures about the payments come as Mrs. Trump takes on a more substantial role advocating for her husband's candidacy. She made her first speech in months Thursday, in which she spoke of her time working as a model in Europe and her decision to come to the U.S.