
Ivanka Trump claimed she could not remember property deals she handled at her father's firm, as she testified in a civil fraud case that threatens his business empire.
A judge has already found Donald Trump and two adult sons, Eric and Donald Jr, liable for fraud, ruling they inflated assets to secure favourable loans.
Ivanka Trump, 42, was initially a co-defendant, too, until an appeals court ruling in her favour this year.
She fought hard to avoid testifying.
The mother-of-three had argued she could not leave her children in Florida during a school week.
But a New York judge and appeals court ruled she must take the stand as a witness.
This is a non-jury trial, in which the judge will decide on allegations of falsifying business records, insurance fraud and conspiracy.
Mr Trump - the former US president and Republican frontrunner for next year's White House election - could be stripped of prized assets like Trump Tower. He and his sons deny wrongdoing.