One of Australia's largest providers of private vocational training, Evocca College, is facing a potential class action from hundreds of former students.

Solicitor Benjamin Kramer has told the ABC he is preparing to file documents on behalf of former Evocca College students.

He will allege the private company breached Australian consumer law by providing sub-standard courses and using unfair marketing tactics to sign students up.

"I've been blown away by how many people have been forthcoming with their own experiences and their own claims of how they've felt they've been wronged by the school," Mr Kramer said.

Evocca CEO denies claims

Evocca College chief executive Craig White said the company was surprised to hear of the potential court action and completely rejected the allegations.

"It is not supported by any demand that has been issued to or received by Evocca," Mr White wrote in a letter to the ABC.

"No particular course offering has been alleged to us to be sub-standard; and no marketing practice has been alleged to us to be in breach of any law."

Evocca College has more than 40 campuses around the country and reaped more than $400 million of Federal Government funding from 2012 to 2014.

It operates in Queensland, New South Wales, Victoria and Tasmania, recently expanded into South Australia and its website says Evocca has imminent plans to enter the Western Australian market.

Evocca largely offers diploma courses in business, information technology, community services and travel, tourism and events.

Its average student loan in 2013 was $16,878.

Its business model depends on the VET FEE-HELP funding system, where private training providers receive government funding and students incur a HECS style debt that they are not forced to repay until they earn more than $53,000.

Figures released to a Senate Committee last month show just 32.9 per cent of Evocca College students graduated between 2011 and 2014.

Mr White said the completion rate was almost 9 percentage points higher than the industry average, and the vast majority of its students were satisfied with their course.

Student told course would cost $14,500, debt totalled $30,000

Former student 21-year-old Shaquille Ray lives in Sydney's western suburbs.

He signed up to a digital media training course with Evocca as a 19 year-old after being approached by a spruiker at a Campbelltown shopping centre.

Shaquille Ray was a student at Evocca and says many of the things the college promised were not true. ( ABC News )

"They promised I would have a pathway to uni, that my tutor would be highly experienced and qualified and they'd help you get a job after, and none of those things were true," he said.

Mr Ray claims Evocca told him his course would cost about $14,500. He later discovered he had accrued a debt under the VET FEE-HELP system of nearly $30,000.

After multiple complaints and alleged problems with the course, Evocca agreed to waive his debt.

But Mr Ray said he felt compelled to help other students who have had a bad experience with Evocca.

"What they're doing is highly unacceptable and something does need to be done," he said.

Earlier this year the ABC revealed allegations from former Evocca staff and students about unethical practices and low graduation rates.

Two weeks later the Federal Government announced regulatory changes to the vocational training sector, including banning incentives to students like free laptops and tablets.