Sydney pensioner who claims his $3.3m winning lotto ticket was thrown away continues court case

The long-running case of a Sydney disability pensioner who says he's the winner of an unclaimed $3.3 million 1997 Lotto prize may soon be over after a judicial officer inspects "highly confidential" data.

David Owen Renshaw is suing NSW Lotteries over the unclaimed prize, saying he handed in his ticket at Granville Railway Station newsagency following the September 23, 1997 draw.

Mr Renshaw, who launched his NSW Supreme Court lawsuit in 2016, has previously said when he handed in his ticket to the newsagency he saw the words "provisional winner" come up.

But, he says, the shop attendant - who didn't speak English very well - threw the ticket in the bin saying "no winner" and refused to return it.

The unclaimed $3.3 million is one-third of the first division prize in Oz Lotto Draw 188.

On Tuesday, lawyers for NSW Lotteries and Mr Renshaw asked Associate Justice Joanne Harrison to inspect confidential data to see if it matches with details Mr Renshaw has given about the ticket he said he purchased.

If it doesn't, the case would be dismissed, said the organisation's lawyer Justin Jogan-Doran.