Disgraced rugby star Israel Folau's bid to raise money via GoFundMe for a court challenge to his sacking over homophobic social media posts could be in breach of the site's rules.

By early Friday afternoon, Folau had raised more than $308,000 for legal proceedings against Rugby Australia and Rugby NSW over the termination of his contract.

Watch the video above

"Sadly, after I uploaded the messages from the Bible, my employers, Rugby Australia and Rugby NSW, tore up my employment contract," Folau writes on his GoFundMe page.

Folau was sacked from his $5 million contract after repeated social media posts claiming gay people would go to hell.

NOT HAPPY: Former teammates turn on Folau over ‘sickening’ act of ‘greed’

RELATED: Anti-Izzy GoFundMe set up to take on 'hate-preaching' Folau

However, he says the posts were simply an expression of his religious beliefs.

"I believe the termination of my contract is unlawful, which is why I have started legal proceedings against Rugby Australia and Rugby NSW."

Related: Israel Folau: Star player sacked by Rugby Australia over controversial Instagram post

But according to GoFundMe's list of terms and conditions, users may not attempt to raise money "for the legal defence of ... intolerance of any kind relating to race, ethnicity, national origin, religious affiliation, sexual orientation, sex, gender or gender identity, or serious disabilities or diseases".

Related: Israel Folau's GoFundMe set up despite years of million dollar salaries and property portfolio

Although Folau has committed no crime with his posts, he is asking for money for legal action to defend a penalty imposed because of his anti-gay missives.

In 2015, the site shut down attempts to raise funds to defend a Christian florist in Washington and a baker in Oregon who both used faith as a justification for refusing to supply their wares to same-sex weddings and faced legal sanctions as a result.

But a source close to Folau's legal team told 7NEWS.com.au they had no doubts about the campaign.

"We are absolutely confident that the campaign is 100 per cent compliant with all relevant rules and regulations," they said.

Comment has been requested from GoFundMe.