There are a number of ways you can collect payments on your online shop. You can use any of the existing payment gateways already supported, e.g. Authorize.net, Google Checkout, PayPal and many more. Or you can opt to use the "Process Offline" method that captures payment details from customers and you can then process these manually using your existing point-of-sale (POS) system. You can also enable customers to choose to pay by Check and COD.