As our readers will recall, this is the same feature that made mention of the confidential letter Prince Harry's wife sent to her father Thomas Markle in 2018, causing a firestorm of issues for her in the media.
As part of Thursday's court filing, the Duchess of Sussex provided a witness statement, in which she says: "Associated Newspapers, the owner of The Daily Mail and the Mail on Sunday, is threatening to publish the names of five women - five private citizens - who made a choice on their own to speak anonymously with a United States media outlet more than a year ago, to defend me from the bullying behaviour of Britain's tabloid media".
The Duchess of Sussex has accused the Mail on Sunday of trying to put her friends' mental health at risk by threatening to publicly name them.
The Mail justified publishing the letter by saying five unnamed friends of Meghan had put her version of events in interviews with the U.S. magazine People. But it said the court should decide on the confidentiality to which Meghan's friends are entitled.
Through her lawyers, Meghan has denied authorising these friends to speak out on her defence, claiming she only found out about the article shortly before its publication and didn't know the contents of it.
"These five women are not on trial, and nor am I, " the statement said.
"Each of these women is a private citizen, young mother, and each has a basic right to privacy".
A source cited by People revealed that the Duchess of Sussex was greatly annoyed by the royals for their persistent need of pulling her back from making statements or defending herself against inaccurate claims going rife about her in the press.
The royal source said: 'The palace teams are faced with the difficulty that when things go wrong - particularly on private life matters - quite often any action taken with the media makes it worse. "Please stop victimising me through the media so we can fix our relationship". "The publisher of the Mail on Sunday is the one on trial".
Meghan Markle is asking a British court to keep her friends' identities secret.
They claim Thomas Markle Snr only made the letter sent to him by his daughter public to dispute claims made in that article.
The duchess lost the first battle in the High Court against ANL as it applied to have sections of her case struck out.
In the ruling, Mr Justice Warby said the parts of Meghan's case which should be struck out include allegations "the defendant acted dishonestly, and in bad faith", and "deliberately dug up or stirred up conflict between the claimant and her father".