This is good article from Cambridge News.
Warning of the latest scam on card reader.
Be very careful of receiving a card reader in the mail.
Scammers tricked an elderly woman out of all of her life savings- including money she had put aside for her granddaughters - after they sent her a bogus card reader machine. Someone sent the Greater Manchester woman a Royal Bank of Scotland card reader in the mail, but she decided she did not need it.