• Signed copy of Board resolutions proving the change of name
•  Signed copy of Shareholder's resolution approving the change of name

 What are the guidelines for selecting Company’s Name?

You should select your name keeping in view the strategic needs of business. New name shouldn’t be identical to another existing name. 
The name of partnership firm should not contradict the arrangements of The names and Emblems (Prevention of Improper Use) Act, 1950. It should not contain words like Crown, Emperor, Empress, Empire or any other word indicating government approval. or support of the government except where consent has been obtained from government for using the word. Other considerations:

What is the validity period of the Company Name that is approved?

An approved name is valid for a period of (i) 20 days from the date of approval (in case name is being reserved for a new company) or (ii) 60 days from the date of approval (in case of change of name of an existing company)

Is there any use of Company’s old name when it has been changed?

Yes, Company is required to paint or affix or print, along with its name, the old name or names so changed during the last two years.