How do you go about charging off your unsecured credit?

A "charge off" is not done by the person owing the money. It is a term used by the creditor that means the account is being written off as a loss. An action taken for tax purposes. The debt is usually sold to a collection agency, which will proceed with the collection process, phone calls and letters. After a period of time, the account may be referred to a collections attorney, who will decide if a lawsuit should be filed.