The star took to Twitter, writing: "Hello everyone, hope it is a beautiful Thursday.
After months and months of thinking you would all know that is NOT Mason on these fake accounts, some of you don’t.
She followed up, tweeting, "And to the person relentlessly pretending to be Mason, ultra ultra ultra creepy.
"He started an Instagram yesterday and didn't ask us," Kourtney said at the time. "I did delete it because Scott and I just felt like, he's 10!
if anyone knows the pitfalls of social media it's the Kardashian family!
Back in 2020 Mason did have an Instagram account. However his parents promptly deleted it.