Authorities warn that the Federal Government should continue funding the National Partnership Agreement on Homelessness (NPAH), or put tens of thousands at risk.

The NPAH is currently helping about 80,000 people change their lives for the better, by trying to secure housing for people who have been cast out from other avenues for assistance.

“These are the organisations that pick up the people who have fallen through all the other cracks,” Glenda Stevens, the chief executive officer of Homelessness Australia, has told the ABC.

She says the services “are really the safety net of our community.”

The NPAH covers a broad range of services and obligations undertaken nationwide to try to prevent sources of homelessness, break the cycle for people stuck on the streets and improve institutional responses in the long term.

By mid-year, the NPAH will have been awarded and overseen the distribution of $1.1 billion in Commonwealth, state and territory funding since it was set up in 2009.

The previous government signed a one-year transitional arrangement last year, but providers want some longer-term assurance.

“Already we're seeing a great deal of stress amongst service providers, staff are actually looking around and leaving and finding other employment because they're uncertain as to whether their job will still exist in a few months' time,” Ms Stevens said.

“This in turn is impacting on the clients because they're not receiving the support they should be receiving.”

Senator Scott Ludlam, the Greens’ spokesperson for housing, says every day the Federal Government does nothing could see another person missing out.

“It's imperative the Government doesn't wait until the budget to get this sorted,” Senator Ludlum said.

“What we know is happening behind the scenes is nothing, and it's not the fault of the states and territories as far as we can tell.

“I'm aware of homelessness services that are closing their doors this month and will be laying people off if the funding agreement can't be secured.

“You can't keep staff on if you don't know how you're going to be able to employ them in a few months' time,” he said.

Social Services Minister Kevin Andrews has so far made no public comment on the issue.