When we ask about what are the most important elements of a business firm from market experts, Product, promotion and marketing are the most common answers you will hear. Today I will like to highlight another very important element of a business firm which is billing. If your customers are not happy with billing facilities and terms of payment, then eventually they will switch to your competitors.  Usually, criteria which customers use to evaluate the billing procedures of a company contains fairness of billing, checking the history of payments and ease of making payments. If these elements are missing from your billing methodologies then expect a poor customer response both in terms of your product usage and feedback. We live in a digital world; business firms are customizing their operations in order to cater their customers in more effective manner. Same is the case with billing plans, some customers want