On the eve of Super Netball's First Nations Round, Noongar woman Donnell Wallam has received an offensive fan letter that Netball Australia has labelled as "disgusting racial abuse".

Delivered to Netball Queensland's headquarters, the mail is signed by an unidentified source named "Mary" and was reportedly handed to Wallam to open without first being checked.

Fans are calling for the sender to be investigated and given a life ban from the sport.

In a joint statement, the state and national sporting bodies condemned the letter sent to their "champion player".

"We applaud and admire [Donnell's] strength, courage and dignity in the face of such hate," the statement read.

"Netball Australia and Netball Queensland are committed to First Nations inclusion.

"We all have zero tolerance of racism and all forms of personal abuse.

"Netball Australia, the Origin Australian Diamonds, Netball Queensland and the Firebirds are providing Donnell our total support and care.

"Publicly calling out racism in all its forms is a critical step to stopping the abuse."

If the Firebirds shooter hadn't already had to endure enough scrutiny during her four-year professional career, all eyes will now be on her again in the team's upcoming match against the Sunshine Coast Lightning to see how she will respond on court.

In the letter, the netball fan, who hails from Wallam's home state of Western Australia, claimed the First Nations player was a "disgrace to her tribe" and tried to square the blame on her for the failed Diamonds $15 million sponsorship deal cut with Hancock Prospecting in late 2022.

Under different leadership – with then Netball Australia chief executive Kelly Ryan and chair Marina Go in charge before they both departed in 2023 – the sport was in financial trouble and hoped this money injected by Gina Rinehart's mining company would be a much-needed lifeline.

However, the sponsorship had not been run by the players or checked with the relevant advisors as to whether it was culturally safe – despite a Declaration of Commitment signed back in 2020 after the Jemma Mi Mi incident, where the sport promised to better support its First Nations athletes and ensure the game was inclusive for all.

Issues then arose once the Hancock Prospecting deal was made public and Wallam voiced her concerns about comments made by the company's founder and Rinehart's father, Lang Hancock, in the 1980s regarding the sterilisation of Indigenous people.

Originally reluctant to wear its logo on her Diamonds dress, and backed by the rest of the playing group in her stance, several meetings were held behind the scenes to try and come to an agreement that satisfied all parties and allowed the sponsorship to proceed while offering Wallam an exemption from wearing the logo.

An invitation was also made for the company and Ms Rinehart to come out and distance themselves from Lang Hancock's comments, but that invitation was not taken up.