Some companies also doing Social Media Background Check. Careful what you write on Lowyat haha.
https://applya.com/employment-screening/how...ck-on-yourself/

I'm sure they say that's trade secret, but one professional background search company wrote this on its website:

"Most nefarious individuals are adept at covering their tracks on social media. Their favorite trick is having multiple accounts under different names. Without detailed investigations, you can fail to detect the truth about them."

"At xxxxxxxxx, we have the tools for conducting exhaustive social media background checks. We cross-check all information across social media platforms and even non-social media sources. In the end, we provide you with a comprehensive review of an applicant." https://crimcheck.net/services/social-media...kground-checks/

Also when you sign up for one website you probably associate that with another email or phone # you use. They might connected together.