What Type Of Letter Should Give To Employees For The Company Name Change.

Dear all,
I wish to know the procedure to inform the employees regarding company name change and Is there any necessary to give any letter to relieving employees who was worked in "A" company and continued his employment with "B" (name changed) company. Looking for the valuable guidance asap.

Just prepare a general notice on new company letterhead mentioning that the company name is changed with effective date. In the last para mention that all the existing terms & conditions of employees will continue. Their date of joining will also remain unchanged.