Basic creditcard / debitcard / smartcard graph...

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Some basic advice has been issued by Apacs, and includes:

    * Don’t let your cards or your card details out of your sight when making a transaction
    * Do not keep your passwords, login details or Pins written down
    * Do not disclose Pins, login details or passwords in response to unsolicited emails
    * Only divulge card details over the phone when you have made the call or when you are familiar with the company
    * Access internet banking or shopping sites by typing the address into your browser. Never enter your personal details on a website you have accessed via a link from an e-mail
    * Shop at secure websites by checking that the security icon is showing in your browser window (a locked padlock or an unbroken key)
    * Always log out after shopping and save the confirmation e-mail as a record of your purchase

For more advice you can visit Spotting and avoid common scams, fraud and schemes online and offline
and
Online payment Security and Fraud Prevention