Which of the following is the best definition of a source document in the accounting process? A source document shows all the information about the legal rights a company has in relation to when it should pay a bill. A source document identifies and describes transactions and is the basis for entering an event into the accounting system. A source document is used to determine who hired an employee that is assigned the duty of entering transactions into the accounting process. An account is a record of increases and in a specific asset, liability, equity, revenue or expense