US President Donald Trump’s daughter and Mr Kushner were hit with a lawsuit on Sunday alleging they had failed to identify assets owned by 30 investment funds they had stakes in.
Washington DC-based lawyer Jeffrey Lovitky claims the couple, who are both serving as advisers in the White House, both didn’t identify the income they received from two other investment groups.
According to the suit, Mr Kushner has cited a “pre-existing confidentially agreement” which prevents him from providing detailed information at six difference places in his financial disclosure report.
But Mr Lovitky says that this excuse it not valid.
The suit notes: “The [Ethics in Government Act] does not allow a reporting individual to refuse to disclose the underlying assets of an investment vehicle, on the basis that such disclosure would violate a pre-existing confidentiality agreement.
“Nor does the EIGA allow a reporting individual to refuse to disclose the amount of income derived from any underlying asset of an investment vehicle, on the basis that such disclosure would violate a pre-existing confidentiality agreement,” according to politics news site Politico.co.uk.
Mr Kushner has reportedly updated his financial disclosure forms multiple times since the lawsuit was filed in March.
The couple, both 36, have both been fined for filing financial reports past deadlines.
It comes after Mr Lovitky filed a lawsuit against President Trump earlier this year.
The suit claimed President Trump had filed a disclosure while he was a candidate during the 2016 presidential campaign, which wasn’t clear as to whether and to what extent he was personally liable for various debts shown in the document