1.   And Visa said that if a bank sent a customer an unsolicited card, the customer would have to call the bank to have the debit feature activated.

2.   But consumer groups worry that millions of people are unaware of the debit feature on their ATM cards and the risks it carries.

3.   Still, consumer groups worry that millions of people are unaware of the debit feature on their ATM cards and the risks it carries.

4.   That alarms industry consultants, who fear that many consumers pocket their new ATM cards without reading the material that explains the debit card feature.