"The Department of Magical Transportation had to fine a couple of people the other day for Apparating without a license. It's not easy, Apparition, and when it's not done property it can lead to nasty complications. This pair I'm talking about went and splinched themselves."
Everyone around the table except Harry winced.
"Er - splinched?" said Harry.
"They left half of themselves behind," said Mr. Weasley, now spooning large amounts of treacle onto his porridge. "So, of course, they were stuck. Couldn't move either way. Had to wait for the Accidental Magic Reversal Squad to sort them out. Meant a fair old bit of paperwork, I can tell you, what with the Muggles who spotted the body parts they'd left behind....."
Harry had a sudden vision of a pair of legs and an eyeball lying abandoned on the pavement of Privet Drive.
I don't understand "Meant a fair old bit of paperwork". It looks elliptical (maybe sort of inversion) and it doesn't specify what kind of paperwork it was. How should we understand it?