Fake salary slips

I recently came across someone who faked the salary slip to get a better hike. Is it a common practice? Isn't this verified during background check?

Do companies disclose compensation details, internal pay-grades, internal designation/grade of their ex-employee to the background verification agencies employed my the ex-employees's new employer ?

I had been toiling in my current organization for a good while despite the compensation not being totally fair. Whenever I brought this discussion up with the CEO, he always played the friend card and promised to give me what I deserve o...

Has anyone created a fake offer letter from some other organisations to negotiate salary at your company ? Since it's said to help a lot in your salary negotiations, what's stopping you from creating one ? I don't think companies reach o...