Known by a court pseudonym, Mr Stradford spent six nights in custody after a Vasta jailed him for contempt of court, regarding the service of financial documents.

“I hope you brought your toothbrush,” Vasta told the real estate agent in the December 2018 Federal Circuit court hearing.

Stradford is now suing the judge personally, arguing judicial immunity does not apply to his “outrageous” conduct.

By having its court and prison officers carrying out the judge’s orders, Queensland and the Commonwealth were vicariously liable for false imprisonment, the statement of claim says.

The Federal Court on Wednesday heard a 1965 case involving Tasmania’s Supreme Court was the last known case where an Australian judicial officer was held liable for damages.

“It is a very unusual case, to say the least,” barrister Jeremy Kirk SC, representing Vasta, said.

“It is no small thing to sue a judicial officer, and two governments for relying on a judicial order.”

While admitting he did not follow the law on holding contempt of court hearings, Vasta says in his filed defence he is not liable to be sued due to the doctrine of judicial immunity.

He says he jailed Stradford on a “mistaken belief” that another judge had already found Stradford in breach of court orders.

That was a matter for Vasta to give oral evidence about, Stradford’s barrister suggested.

“He says he made a mistake. How did that mistake come about? Was that mistake just egregious and should it have never come about?” Perry Herzfeld SC said.

The case is on course for a five-day trial in late 2021.

But the respondents on Wednesday applied to have the question of liability answered before a hearing on possible damages.

The court was told an email from Stradford detailed a claim for loss and damages of nearly $2 million.

Aggravated and exemplary damages are also sought, based on the real estate agent’s time in a Brisbane watchhouse and a maximum security jail, and Vasta’s alleged “contumelious disregard” for his rights.

Opposing the splitting of trials, Herzfeld said he didn’t want a drawn-out battle on liability to be followed by Vasta thinking “I’m liable for $2 million, now I want to get into the box”.

But Kirk said there was currently “no practical possibility of my client giving evidence at all”, even at the quantum stage.

The very “invidious” nature of the case meant any hearing on potential damages would force Vasta to decide whether to enter “the muddy field of battle” and seek to have the applicant seen by a psychiatrist of the judge’s choosing.

“The big issue for my client is the judicial immunity,” he said.

Herzfeld pushed back on the invidious reference, saying the unjust position was the week of imprisonment to which his client was subjected based on “what everyone now agrees was a totally flawed order”.

The matter will return to court in June.

Vasta’s contempt of court finding and sentencing of Stradford to a year in jail “constituted a gross miscarriage of justice”, the Full Court of the Family Court said in February 2019.