As the old saying says ‘It takes years to win a customer and only seconds to lose one’. Customers are the pillars for the success of a business. Either we sell goods on a cash or credit basis, we should have supporting evidence. A Bill is a memo or voucher or document indicating goods sold, quantity, rate, name, and address of the customer. It’s a stamp of being sales made to the customer. The billing pattern varies from one company to another but principal elements of billing/invoicing remain the same.