Disgraced former unionist Kathy Jackson has lost her bid to appeal a damning court judgment ordering her to repay the $1.4 million she siphoned from the Health Services Union.

The Federal Court in Melbourne had previously found Ms Jackson had abused her position as secretary of the union to fraudulently gain financial advantage for years.

Her unauthorised expenses included hundreds of thousands of dollars blown on overseas holidays, luxury items such as designer clothes, lavish dinners, valuable artwork and home groceries.

But Ms Jackson filed an appeal, alleging Justice Richard Tracey denied procedural fairness by dismissing her cross-claim and her abuse-of-process application in which she alleged union and Labor leaders including Bill Shorten had conspired against her and boxes of evidence had been destroyed.