A spokesman for Territory and Municipal Services Directorate said there would be extra enforcement, watching shopping centres and arterial roads, in the lead up to the election.

"Other staff within TAMS will also be reporting any incorrectly placed signage to the city rangers during the course of their job. We are also hopeful that by working with the parties from the outset of the election campaign to help educate them about their responsibilities that it will minimise any required compliance action and impoundment of signs," he said.

Any signs attached to government property such as trees, traffic lights and light poles will be removed. Signs are also banned from roundabouts, median strips or areas within 20 metres of either traffic lights or the corner of an intersection.

Stickers are not allowed and signage cannot require support from any other object.

Signage must also be removed within 48 hours of the close of polls.

It comes as illegal signs in support of the Greens lasted just hours before being removed from Canberra roadsides.

A total of 30 signs placed by volunteers for ACT Senate candidate Simon Sheikh were removed on Monday by city rangers.

A spokeswoman for Mr Sheikh said volunteers had accidently placed the signs in an unapproved area during a campaign blitz on Sunday evening.

“It was a mistake and it’s bound to happen when it’s a volunteer driven campaign,” she said.

The TAMS spokesman said a Greens representative had been informed of the violation.

“We removed some signs yesterday and spoke to a representative from the party concerned,” he said.

“We removed a total of 30 signs, 18 from Adelaide Avenue and 12 from Yamba Drive.”

He said a penalty and collection fee could be imposed for holding the signs, but had not been enforced in this instance.