One of my previous employer (Twitter) has a policy wherein they will not disclose the details regarding my role in the company. They have a particular format in which this letter is issued and it contains the following items :
	
		
			
		
		
	
				
			- Joining date and Relieving Date
- Passport Number
- Salary
- Designation
- Employee Id
- HR name, Designation, Email
- Company Postal Address
 
	
 
	