This chapter describes PayPal’s evolution and contains a description of the various mechanisms offered for personal accounts and business account. PayPal decided to use bank account-funded payments to reduce the amount of bonus payment to new accounts by mandating additional steps in the registration process. Automatic enrollment with stolen credit card numbers is a way to take unfair advantage of the way PayPal operates to extract money. PayPal’s portfolio included the functions of payment gateway and payment processor and offered solutions for securing online payments, fraud prevention, seller, protection, and financial reporting by integrating back-office systems. With the acquisition of Braintree and Paydiant, PayPal enriched its mobile commerce offers to businesses. PayPal provides a virtual terminal capability so that small merchants could accept bank card payments without additional equipment. Buyers are transferred to the PayPal server to fill in the hosted checkout pages.