The former Health Services Union national secretary is being sued by her former union, accused of having wrongfully spent about $1.4 million of HSU funds.

But with her trial scheduled to begin later this month, the HSU on Monday sought court orders for Ms Jackson's assets to be frozen amid concerns she would try to sell her home on the NSW south coast in a bid to block the union from accessing those assets.

"The reality is, to some extent, it's too late for that," Ms Jackson's barrister, Mark Robinson, said.

"The property at Wombarra, to which I think the freezing order was directed, has effectively been sold ... documents of transfer have been executed in favour of her de facto husband."

Ms Jackson has allegedly claimed in court documents that hell would freeze over "before the union sees a penny", according to HSU lawyer Mark Irving.

It is understood that the sale of the Wombarra property, which was bought for $1.3 million in 2012, is not yet formally registered, and the HSU is now seeking to halt the process.

Ms Jackson on Monday told the Federal Court she has received $65,000 from her partner for the sale of the large coastal property, which she claims is all she has left to fund day-to-day expenses and legal fees for the looming civil lawsuit against her.

Ms Jackson shot to prominence as  a whistleblower alleging corruption within the HSU involving former national president Michael Williamson, who is now in jail.

But she has come under scrutiny over her own conduct, with the union launching a large-scale lawsuit to retrieve money the union claims she used to fund a five-star lifestyle.

Ms Jackson has denied that any of her expenses were unauthorised, and claims she had permission to spend $28,000 a year on travel for conference and sabbatical purposes. Her statement of defence said all claimed expenses relating to food, alcohol, entertainment and fitness were work-related.

Justice Richard Tracey on Monday said he would consider issuing an injunctive order unless Ms Jackson made an undertaking to the court that she would cease the transfer of ownership.

"No further steps should be taken to effecting a transfer of the registration of the property before the permanent stay application has been determined. I will seriously consider an injunctive order.

"I do not think that the registration should advance any further so that it becomes a fait accompli before I have an opportunity to deal with the freezing application."

Mr Irving, for the HSU, said a promise from Ms Jackson not to continue with the sale was insufficient given the transfer process was so advanced.

Justice Tracey is expected to rule on the injunction next week.

Ms Jackson has also applied for a permanent stay on the case against her, saying it is a "beat-up" and a "conspiracy".