Australia and New Zealand Banking GrpLtd(ASX: ANZ) and Commonwealth Bank of Australia(ASX: CBA) share prices are slipping today after a news report the banks are facing a class-action lawsuit for their insurance products. At market open, the ANZ share price is down 1.8% to $28.35, the Commonwealth Bank share price is flat at $87, while the Westpac share price is down 1.17% to $24.95. Big four banks under fire for consumer credit insurance The big four banks are under fire for their consumer credit insurance (CCI), which is marketed as protecting consumers against late or missed payments. In reality, the insurance pays out less than 10 cents for each dollar paid in premiums. This is compared to an average of 89 cents for every dollar paid in car insurance premiums.