The process of background verification? Does it go to the previous company's HR? What is asked of them?

Hi, Can I know the process of background verification? Does it go to the previous company's HR? What is asked of them?

Hi, In normal course through email they will check regarding your authenticity of the details provided by you right from

Name
Emp no.
DOJ
Designation
Last drawn CTC
Date of resignation
Date of leaving
Whether exit formalities completed
Whether eligible to rehire
Any other additional remarks
Name and contact number of person verifying the details.