Tasmania's Liberal Government wants the Commonwealth to delay the expansion of Centrelink's troubled debt recovery program.

The automated service has copped a barrage of criticism for wrongly issuing debt notices and prompted an investigation from the Commonwealth Ombudsman.

Earlier this week it was revealed the program would be expanded later in the year to focus on aged pensions and disability support payments.

Tasmania's Human Services Minister Jacquie Petrusma said in a statement she called on her federal counterpart Alan Tudge to proceed with the expansion only when he was confident the process was correct.

"We are concerned about the issuing of incorrect debt notices and the impact this is having on vulnerable Tasmanians, and their families, who have been inadvertently caught up in this process," she said.

"The recent announcement that families, pensioners and people living with disability will be added to the debt recovery program adds to the concern given the high percentage of Tasmanians who are in receipt of such payments.

"Tasmanian community services organisations have reported a significant increase in requests for support from people in our community."

Liberal Senator Jonathan Duniam has also written to Mr Tudge expressing concerns with the system.

Mr Tudge has insisted the Centrelink service was working well.

Tasmanian concerns a 'wake up call'

TasCOSS CEO Kym Goodes repeated her call for the automated program to be scrapped and its defects fixed.

"It should absolutely be a wake-up call to Minister Tudge and the Turnbull Government that the leadership of the Tasmanian Liberal Party, in terms of its state and its Liberal senators, have been brave enough to stand-up and say this isn't right, we have got it wrong and it's time to make a change," she said.

"We think that this is a very aggressive use of power against Tasmanians and Australians and it shouldn't be able to continue."

She said many Tasmanians had been caught up in the troubled system because a higher proportion of the state's residents received Commonwealth income support.

"Older Tasmanian's are more likely to be on aged pension and we have a higher rate of people on the aged pension than any other people in Australia," she said.

"Equally we have a lot of young people who are really struggling in terms of employment."

This week Tasmanian welfare organisations ramped up support for those being sent incorrect debt notices by Centrelink.

Several organisations have pooled $12,000 to help community legal centres assist those caught up in the controversy.

The debt recovery service is also likely to face a Senate inquiry when Parliament resumes.