A publisher of the U.S. graduate business school entrance test has thrown out the scores of 84 prospective students after shutting down a Web site they used to cheat on the exam.

The Graduate Management Admission Council began tracking down users of Scoretop.com after winning $2.35 million in a copyright-infringement lawsuit in June. The suit allowed the council to shut down the site and seize a computer hard drive containing payment information and users' identifications.

Scoretop had flogged access for $30 a month, and users could preview current questions on the latest GMAT, some posted by users who took the exam. Now it looks like any student who had signed up to the site will see their test result chucked out.

An investigation of 6,000 scores from 2004 to 2007 found that 12 people posted questions from the exam on Scoretop. Those people will be barred from retaking the test for at least three years. The 72 people who posted messages on Scoretop confirming that they saw items from the site on their GMAT exams will have to retake the exam.

The Stanford Graduate School of Business received 20 score cancellations from GMAC regarding 11 applicants.