1 Answer

Online shoppers commonly use a credit card or a PayPal account in order to make payments. However, some systems enable users to create accounts and pay by alternative means, such as:
Billing to mobile phones and landlines[5][6]
Cash on delivery (C.O.D., offered by very few online stores)
Cheque/ Check
Debit card
Direct debit in some countries
Electronic money of various types
Gift cards
Postal money order
Wire transfer/delivery on payment
Invoice, especially popular in some markets/countries, such as Switzerland
Some online shops will not accept international credit cards. Some require both the purchaser's billing and shipping address to be in the same country as the online shop's base of operation. Other online shops allow customers from any country to send gifts anywhere.
The financial part of a transaction may be processed in real time (e.g. letting the consumer know their credit card was declined before they log off), or may be done later as part of the fulfillment process.

http://en.wikipedia.org/wiki/Online_shopping