An Invoice is a document issued by the business to its customer, detailing out the services and/or products sold to them. It creates an obligation for the buyer to pay. It lists the items sold, their quantities, and the amount payable for each of them. An invoice typically provides the following details:
Chargebee automates the entire process flow of invoicing, starting from a new subscription sign up, when the invoice is created, to all payments made between the merchant and buyer. Email notifications can be sent out as well, informing buyers of the transaction status. More on invoices here.