Azealia Banks has sent a cease and desist letter demanding $1 million (£780,000) from Matty Healy amid their online feud.
Last week, the 212 rapper shared a clip of Charli XCX's 2014 track Break The Rules via X and wrote, "Charli used to be soooo pretty. Ugh."
Later, Matty came to the defence of his friend and collaborator, who is engaged to his bandmate George Daniel, before going on to exchange a number of insults with Azealia - including threatening to slap her "so hard".
And on Sunday, the hip-hop star returned to the platform to post a copy of a legal letter she had asked her lawyer Wallace J. Collins III to send to the English singer-songwriter in response to his alleged "threats of violence".
"Your attacks against my client's professional reputation, your overt racial epithets and your most recent threats of physical violence against my client have been well-documented since you published them worldwide online," the lawyer writes, noting that he has screenshots of now-deleted messages.
Collins also labelled Healy's alleged behaviour as "wrongful, bad faith and malicious".
"Your removal of the damaging attack posts and your acknowledgement that your reaction was inappropriate does not undo the damage, but rather constitutes evidence of an admission of guilt by you," he continues.
To conclude, Collins explained that he has drafted a lawsuit per Banks's request but would prefer to resolve the matter without "court intervention". He asked Healy to refrain from making any further comments about Banks, offer a public apology, and give her $1 million for "full settlement of this matter".
Representatives for Healy have not publicly responded to the letter.
After the feud hit headlines, the 35-year-old issued an apology via X and a longer statement in a Reddit post in which he insisted he was "embarrassed" by his outburst.
"I just feel dreadful about how I acted violent - I think Azealia and all obvious flawed people all deep down have a heart and I hate that I have contributed to her mental fragility. She's a human," he wrote.
