Furthermore, the council, at last Thursday's meeting, said it will exclude Westpac from getting any of the $70 million-plus term deposits held by the council, that mature this year.

"We will also divest $1 million currently invested with Westpac at the earliest opportunity that will not lead to financial harm for rate payers," the motion said.

In response, the head of media communications at Westpac, David Lording, said the bank has "not been approached for funding by Adani".

"But if we are approached we would look at it in the same way we look at all such funding proposals, in regard to any economic, governance and social impact," Mr Lording said.

"Westpac is also currently undertaking a review of our climate change action plan."

On April 10, Westpac's 200th birthday party was targeted by climate change and anti-coal protesters seeking to pressure the bank into guaranteeing it will not fund the proposed Adani coal mine in Queensland.

Despite Westpac having no plans to fund the project, organisers from Stop Adani Sydney gathered protesters outside the driveway to Carriageworks, Eveleigh, to chant "Stop Adani" at cars dropping off guests to the invite-only event.

Those opposed to the mine say money is one of the final hurdles Adani needs to clear before it can start building Australia's largest thermal coal mine in the Galilee Basin in central Queensland.

The $16.5 billion mine already has state government and environmental approval. The coal will be sent via Abbot Point to India to be burned for electricity.

Byron councillor Michael Lyon said it is time to "get serious" on climate change.

He said the motion was passed to put pressure on Westpac to make a statement about any funding of Adani. The other three main trading banks have said they are not funding the mine.

"Investment in renewables is the only sensible path forward and Adani's mine proposal is a step backwards. Any financial institution stuck in the past needs to understand that they will face a mass exodus of customers until they do what is required for a sustainable future," Mr Lyon said.

He said Byron has an alliance with six other councils who are also opposed to the mine.

"We passed this motion in support of Darebin Council, who advanced a similar initiative earlier this month, and other councils that have taken a similarly strong stance," Mr Lyon said.

Byron Shire mayor Simon Richardson added "the Adani mine will be a stranded asset before it is built and be a legacy to economic stupidity and inflexible ideology".

"Hopefully Westpac will join the community of Byron Shire and embrace the opportunities for a renewable and fossil free future," Mayor Richardson said at the meeting.