Sam, 31, is currently at the centre of a mega feud with Ferne, 32, after the emergence of several audio messages this week.
In the leaked notes, a voice that sounds like Ferne’s brands the mum-of-three “fat c**t” and “a f***ing narcissist”.
Ferne is yet to break her silence over the allegations, which are being posted to a public Instagram account.
The account now has more than 23,000 followers and the mystery poster has threatened to leak a further 36 in the coming days.
Fans are now determined find out who is responsible and have come up with a clue.
The Instagram account is called @lucymay195.
They have twigged that Club 195 was the name of an Essex nightspot Ferne, Sam and her sister Billie used to frequent in their Towie days.
One fan wrote online: “This is 100 per cent someone they all know. 195 was the name of a club (it’s closed now) in Epping that they all used to go to.”
In 2019, Club 195 had its licence revoked following several violent incidents, including a stabbing. It never reopened.
The first audio note, released over the weekend, which mocked Sam’s weight, was said to have been sent just days after Sam had given birth to her second child in May.
In a second, a woman who appears to be Ferne, can be heard saying: “She is just a narcissistic b***h.
“It’s just so s**t on people that have worked hard, because she’s got a big following. It’s just ridiculous — it’s out of order.”
Last night, a third audio note was released on the anonymous Instagram page.
The recording is thought to be five years old, sent close to the time Sam’s sister Billie gave birth to her second child – a baby boy.
In it, a woman, who appears to be Ferne, is heard talking about how she feels about Billie naming her son Arthur – which is the same moniker as her acid-attack ex-boyfriend Arthur Collins.
In the recording, the person who sounds like Ferne is heard saying that they think the decision was odd and would have been like Ferne calling a child she had Greg – the name of Billie’s husband.
The voice on the recording says: “It feels so weird saying ‘Arthur’, I can’t believe it.
“It’s like me having a little boy and calling him Greg. Anyway, whatever.”
The leaked audio notes have caused outrage, with many turning on Ferne for what she has appeared to have said.
Meanwhile, The Sun has exclusively revealed that concerned ITV bosses have spoken to Ferne to hear her side of the story.
Ferne has her own reality show on ITVBe called Ferne McCann: First Time Mum.
A source said: “It isn’t just Towie fans that are talking about the audio notes – but the team at ITV who put Ferne’s show on the box.
“They have spoken to her about the messages and the backlash which has followed in its wake.
“Those involved will be keeping an eye on what else comes out and they will be keeping in touch with Ferne.”