The internet is finding the story ironic given Musk's conservative stance against immigration.
A judge ordered all parties, including Elon Musk, to attend a court hearing in Philadelphia on Thursday in a lawsuit seeking to stop a political action committee controlled by the billionaire from awarding $1 million to registered U.S. voters in battleground states ahead of the Nov. 5 U.S. election.
The Philadelphia District Attorney's Office filed the lawsuit on Monday. It called the giveaway by Musk's America PAC, which backs Republican former President Donald Trump, an "illegal lottery" that enticed Pennsylvania residents to share personal data.
"It is further ordered that all parties must be present at the time of the hearing," a judge wrote on Wednesday in an order with the Philadelphia County Court of Common Pleas. The hearing in the case was moved up to Thursday morning from Friday.
Trump faces Democratic Vice President Kamala Harris in what polls show to be a tight race for the White House.
A representative for America PAC did not immediately respond to a request for comment. Musk's representatives have not responded to requests for comment.
Musk promised to give $1 million each day to someone who signed his online free-speech and gun-rights petition. Legal experts consulted by Reuters last week were divided on whether the giveaway violates federal laws that make it a crime to pay or offer to pay a person to register to vote.
The Justice Department sent a letter to America PAC warning that the billionaire's giveaways for registered voters who sign his petition may violate federal law, CNN reported last week.
The Trump campaign is broadly reliant on outside groups for canvassing voters, meaning the super PAC founded by Musk - the world's richest man - plays an outsized role in what is expected to be a razor-thin election.
The crowd-sourced fact-checking feature of Elon Musk's X, Community Notes, is "failing to counter false" claims about the U.S. election, the Center for Countering Digital Hate (CCDH) said in a report on Wednesday.
Out of the 283 misleading posts that CCDH has analyzed, 209 or 74% of the posts did not show accurate notes to all X users correcting false and misleading claims about the elections, the report said.
"The 209 misleading posts in our sample that did not display available Community Notes to all users have amassed 2.2 billion views," CCDH said, urging the company to invest in safety and transparency.
X did not immediately respond to a Reuters request for comment.
X launched its "Community Notes" feature last year, which allows users to comment on posts to flag false or misleading content, in effect crowd-sourcing fact-checking to users rather than a dedicated team of fact-checkers.
The report comes after X lost a lawsuit brought by CCDH earlier this year that faulted it for allowing a rise in hate speech on the social media platform.
Social media platforms, including X, have been under scrutiny for years over the spread of misinformation and conspiracy theories, including false information about elections and vaccines.
Last month, secretaries of state from five U.S. states urged billionaire Musk last month to fix X's AI chatbot, saying it had spread misinformation related to the Nov. 5 election.
Musk, who last month endorsed Republican presidential candidate Donald Trump, himself has been accused of spreading misinformation. Polls show Trump is in a tight race with Democratic Vice President Kamala Harris.