One of Clive Palmer's most trusted employees has told a court she used the company credit card to organise and pay for the overseas holiday of Mr Palmer's fugitive nephew Clive Mensink, who has two outstanding arrest warrants.

Mr Mensink left Australia in June last year and is wanted for questioning by liquidators in the Federal Court over Townsville refinery's collapse, which cost creditors $300 million and nearly 800 workers their jobs.

Mr Palmer's personal assistant Sarah Mole testified that since Mr Mensink left the country, she had been in regular contact with him via emails and text messages, booking luxury cruises for him and his family with all costs being paid by Mr Palmer's personal company Mineralogy.

Mensink left Australia in 2016, and has since been slapped with two arrest warrants. ( AAP Image: Dave Hunt )

Ms Mole told the court hearing in Brisbane she also had phone calls from Mr Mensink after he left Australia, but does not know where is currently.

The email contact between the pair ceased after March 27 this year, days before the arrest warrants were ordered by the court.

She admitted to receiving and forwarding a new Westpac Mastercard and sending his new drivers licence to the US via an international courier.

'Palmer was not in loop with holiday planning'

Asked why she billed all costs to Minerology she said she "believed that was the correct action to take."

"I understand they [the trips] were being paid for by the company, as part of Mr Mensink's entitlements in lieu," she said.

Mr Palmer's personal assistant made travel arrangements for Mensink. ( AAP: Dan Peled )

Ms Mole maintained she was never directed to do so by Mr Palmer nor did she discuss her contact with Mr Mensink with Mr Palmer.

The travel arranged by Ms Mole was always at the direction of Mr Mensink.

Trips included a Mediterranean cruise and flights to the Dominican republic, Fiji and Ireland.

In one email to a travel agent, copied to Ms Mole, he also asks: "If there is a better rate yes please do so and note I am a 3-star mariner".

Mr Mensink is still being paid more than $4,000 a week by Mr Palmer's companies despite the fact there are two warrants out for his arrest for contempt of court.

He weighed into the company's collapse while he was galivanting overseas, announcing plans to launch court action against the company liquidators.

But he refuses to come home to face the court.

Queensland Nickel refinery in Townsville collapsed in 2016, leaving hundreds without jobs. ( AAP: Andrew Rankin )

Ms Mole told the hearing, at times, she also emailed details of the Queensland Nickel inquiry to Mr Mensink, but was not sure if he was still working for the company or not.

"On whose instructions did you send those examinations to Mr Mensink?" Tom Sullivan QC asked.

"I can't recall," she replied.

Pressed further she said there were "multiple possibilities".

"It could have been that Clive Mensink requested them, it could have been that Mr Palmer asked me to forward them."

The hearing resumes on Friday.