Fake Employee joined a company with 7 years experience. that Employee does not have even 1 day experience. Anonymously I want to inform it?

Update: What are the ways to inform it to the HR manager on this Anonymously. what are the ways to complain to the Employer without revealing my name, I want to remain anonymous and complain about it.
Update 2: Can I create an email anonymously complain about it. Is it legal to create an Anonymous email? Do I create email account with Mazor email account providers?
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