The Greens have vowed to try and use parliament to stop the federal government booting asylum seekers off welfare and out of taxpayer-funded accommodation.
Leader Richard Di Natale said on Sunday the minor party was seeking advice on whether the use of a new "final departure Bridging E Visa" - expected to be issued to asylum seekers from Monday - can be overturned when the Senate returns in a week's time.
"We do call on members of the crossbench and the Labor Party to support us in doing everything we can to stop this unspeakable cruel act getting through the Senate," he told reporters in Melbourne.