It is an issue that has nagged many Victorians for years — you top up a Myki card and select the option not to receive a receipt, and yet the machine spits two out anyway.

Seven years after the former Liberal state government promised to address the issue, the current Public Transport Minister said the problem has finally been fixed.

Melissa Horne said a software modification to more than 500 Myki ticket machines meant unwanted receipts would no longer be produced for train, tram and bus users.

Sorry, this audio has expired Myki unwanted receipts no longer

Ms Horne said previous Australian Tax Office requirements meant receipts had to be issued when customers paid for tickets with EFTPOS or credit cards.

"PTV (Public Transport Victoria) has been able to get that clearance from its banking provider to make sure there is the compliance, and no longer would people need to get those receipts," she told ABC Radio Melbourne.

"It's also a litter problem, and it's really good that that has been fixed."

Public transport user groups had long complained that the receipt issue was a security concern because of partial credit card details being published on dockets.

Taxpayers have also been slugged thousands of dollars each month for the receipts, according to media reports.

Ms Horne was unable to say exactly why it had taken so long for the issue to be fixed.

Work continues on Apple ticket app

The Public Transport Minister says the app has proven popular. ( Supplied: PTV )

Ms Horne said more than 100,000 people had downloaded an Android app that allowed them to use their phones as tickets since it was released two months ago.

The Public Transport Minister said more than $1 million had been allocated in the state budget to "continue conversations" with other software providers, such as Apple.

"PTV is working through and has that money in the budget to continue to develop apps on other smartphones," Ms Horne said.

She said "negotiations are ongoing" and did not provide a timeline on when the software could be rolled out.

"With the number of people who are saying mobile Myki is a fantastic way of getting around the network, the sooner the better," she said.