How to change the owner name of a business?

I have a friend that has a business and the owner will be leaving the country. How do they change the owner name to my friend%26#039;s name? what does she need to do?|||The current owner can do that by contacting the Secretary of State if this is a Corporation, LLC or LLP. If it is a sole proprietor, they can file a change with the town or county tax office where they filed their assumed name certificate.|||Tell your friend to go to Commercial Chambers office in your area and get formalities done with a small fees.