The United States Treasury has announced that its online source of U.S. Savings bonds, http://www.treasurydirect.com, will stop the purchase of bonds with credit cards, eliminating a lucrative means of collecting frequent flyer miles.

The Web site, established in October of 2002, boasts 19,000 accounts representing over $112 million worth of bond activity.

The department said that the change is scheduled to take place in 2004.