

Card fraud is a wide-ranging term for theft and fraud committed using a credit card or any similar payment mechanism as a fraudulent source of funds in a transaction. The purpose may be to obtain goods without paying, or to obtain unauthorized funds from an account. Card fraud is also an adjunct to identity theft.
CARD NOT PRESENT (CNP)
The Internet is a major route for fraud against merchants who sell and ship products, and impacts legitimate mail-order and Internet merchants. If the card is not physically present (called CNP Card Not Present) the merchant must rely on the holder (or someone purporting to be so) presenting the information indirectly, whether by mail, telephone or over the Internet. While there are safeguards to this, it is still more risky than presenting in person, and indeed card issuers tend to charge a greater transaction rate for CNP, because of the greater risk.
ACCOUNT TAKEOVER
Account takeover happens when a criminal tries to take over another person's account, first by gathering information about the intended victim, then contacting their card issuer masquerading as the genuine cardholder, and asking for mail to be redirected to a new address. The criminal then reports the card lost and asks for a replacement to be sent.
CARD SKIMMING
Skimming is the theft of credit card information used in an otherwise legitimate transaction. The thief can procure a victim’s credit card number using basic methods such as photocopying receipts or more advanced methods such as using a small electronic device (skimmer) to swipe and store hundreds of victims’ credit card numbers. Common scenarios for skimming are restaurants or bars where the skimmer has possession of the victim's credit card out of their immediate view. The thief may also use a small keypad to unobtrusively transcribe the 3 or 4 digit Card Security Code which is not present on the magnetic strip.
Instances of skimming have been reported where the perpetrator has put a device over the card slot of a ATM (automated teller machine), which reads the magnetic strip as the user unknowingly passes their card through it. These devices are often used in conjunction with a pinhole camera to read the user's PIN at the same time.
CARDING
Carding is a term used for a process to verify the validity of stolen card data. The thief presents the card information on a website that has real-time transaction processing. If the card is processed successfully, the thief knows that the card is still good. The specific item purchased is immaterial, and the thief does not need to purchase an actual product; a Web site subscription or charitable donation would be sufficient. The purchase is usually for a small monetary amount, both to avoid using the card's credit limit, and also to avoid attracting the card issuer's attention. A website known to be susceptible to carding is known as a cardable website.
Carding is more typically used to verify credit card data obtained directly from the victims by skimming or phishing.
A set of credit card details that has been verified in this way is known in fraud circles as a phish. A carder will typically sell data files of the phish to other individuals who will carry out the actual fraud. Market price for a phish ranges from US$1.00 to US$50.00 depending on the type of card, freshness of the data and credit status of the victim.