Chase Card Services said it mistakenly tossed out computer tapes with the personal information of Circuit City card holders. It said it believes the tapes, inside a locked box, were compacted, destroyed and buried in a landfill.
"We deeply regret that this has occurred and apologize to those impacted," Chase Card Services Chief Executive Rich Srednicki said in a statement.
In the past year, several U.S. companies have reported lost or stolen personal data on customers and employees. One of the largest mishaps happened at the U.S. Department of Veterans Affairs, which said in May that data on 26.5 million veterans was stolen.
Chase said it has begun notifying customers and is monitoring affected accounts and has not identified any misuse of personal information. A free, one-year credit monitoring service is being offered to individuals whose social security number was on the thrown out tapes.
"We certainly empathize with the affected cardholders, but this is a business that is administered by Chase," a Circuit City spokesman said.