State Attorney General Lori Swanson filed the lawsuit claiming telemarketers describe sales calls as a "courtesy call" and the rush through descriptions of services they are selling, the Minneapolis Star-Tribune reported Tuesday.
"This is a case of a credit card playing 'gotcha' instead of playing fair," Swanson said in a press conference.
The telemarketers often "speed-read" their sales pitches, slurring words or skipping key phrases, the lawsuit says.
Dent, Minn., postal worker Delbert Engler said he is paying interest on $900 in fees that he never authorized and does not understand. "I couldn't understand a word the person said on the phone," Engler said.
Under the guise of a "courtesy call," telemarketers are really selling payment protection that costs less than a dollar a month for every $100 of outstanding balance, but can add up if a balance runs high.
Discover also sells insurance against the possibility a consumer losses a wallet and identity theft protection for $12.99 per month.
In a statement, Discover spokeswoman Leslie Sutton said, "It's not in Discover's interest to sell a product that doesn't enhance our relationship with our card members."
She would not comment on the lawsuit, the newspaper said.
Copyright 2010 United Press International, Inc. (UPI).