The former president’s elder daughter, who has been in his inner circle in both business and politics, rounds out a major stretch in the trial.
Her father took the stand on Monday, and her brothers Eric Trump and Donald Trump Jr testified last week before she gave evidence on Wednesday (early Thursday AEST).
Unlike her father and brothers, Ivanka Trump is no longer a defendant in New York Attorney General Letitia James’ lawsuit.
It alleges that Donald Trump’s asset values were fraudulently pumped up for years on annual “statements of financial condition” that helped him get loans and insurance.
She said she didn’t recall ever having provided asset valuation information for the statements or having reviewed them before they were finalised.
Before leaving the company to go with her father to the White House, Ivanka Trump was the point person in establishing a lending relationship with Deutsche Bank’s private wealth management arm.
It eventually extended the company hundreds of millions of dollars in loans, with terms that required Donald Trump to submit his financial statements each year.
Ivanka Trump testified that her husband, Jared Kushner, introduced her to a banker as the Trumps were seeking financing to buy and overhaul the Doral golf resort near Miami.
That decision came with provisions that could strip the ex-president of oversight of such marquee properties as Trump Tower, though an appeals court is allowing him continued control of his holdings, at least for now.
James, a Democrat, is seeking over $US300 million ($468 million) in penalties and a ban on Trump doing business in New York.
The ex-president and Republican 2024 front-runner denies any wrongdoing, as do the other defendants.
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He insisted in court on Monday that his financial statements greatly underestimated his net worth, that any discrepancies were minor, that a disclaimer absolved him of liability and that “this case is a disgrace”.
Ivanka Trump’s brothers are still Trump Organisation EVPs, and they became trustees of a trust set up to run the company when their father went to the White House.
The sons also have professed minimal knowledge of their father’s annual financial statements. Donald Trump Jr testified that he dealt with the documents only in passing; Eric Trump said he relied completely on accountants and lawyers to ensure the documents’ accuracy.
As a Trump Organisation executive, Ivanka Trump dealt with securing a loan and a lease for a Washington hotel and financing for Doral in Florida and a hotel and condo skyscraper in Chicago, according to court filings.
As her father’s inauguration neared, she announced in January 2017 that she was stepping away from her Trump Organisation job. After her time in the administration, she moved to Florida.
An appeals court dismissed her as a defendant in the lawsuit in June, saying the claims against her were too old.
Her attorneys contended that she shouldn’t have to testify. They said the state was just trying to harass the family by dragging her into court.
The attorney general’s office argued that her testimony would be relevant, saying she was involved in some events discussed in the case and remains financially and professionally entwined with the Trump Organisation and its leaders.
The company has bought insurance for her and her businesses, managed her household staff and credit card bills, rented out her apartment and paid her legal fees, according to the state’s court papers.
Engoron and, later, an appeals court ruled that she had to testify.