Rahulbhatnet1
"The answer to such mails should be in strict language. The HR is known for discipline......"
There is an old expression that says that "you catch more flies with honey than you do with vinegar". Many people DO NOT like HR. They often see the HR department as enemies, and just there to make their life difficult. However, HR is an essential function of the organisation.
As I pointed out in my reply above, communications from HR need to be clear, unambiguous, and set out what is required and when. But, and there is always a "but", this can be done in a way that fosters, and maintains a friendly, co-operative working relationship between employees and HR. The problem we often have is that power goes to the head of some HR people and they start acting like arrogant and domineering warlords. Adopt that sort of attitude, and I can assure you it will all end in tears.