However, Finch denied this, and produced a quote (exhibit H) from the company addressed to Greg Finch Orthopaedics Ltd, which he said proved Medtronic traded with the company.
After forensic analysis of his computer, and investigations into Medtronic's computer, the quote was found to be a fake.
The "findings of forgery and the fabrication of evidence are of the utmost seriousness", Justice Duffy said.
"Given the reliance that Mr Finch has placed on exhibit H and the assertions he made about this document in his affidavit, I am also satisfied that Mr Finch had knowledge of, and some association with this forgery," she said.
Finch filed for bankruptcy after the forgery came to light last year, which Medtronic argued was "an attempt to avoid the continuation of the proceedings, and the exposure of his connection with the fabrication of exhibit H".
Leave was granted to Medtronic in December 2013 to pursue its claim against him.
In her ruling, Justice Duffy said the forgery had caused her to doubt the rest of Finch's evidence.
"Accordingly, I am satisfied that Medtronic supplied products to Mr Finch personally and is yet to receive payment for those supplies. I find, therefore, that it is entitled to the judgment that it seeks against Mr Finch in its prayer for relief."