If only we had a “three strikes” rule for corporate executives:

WASHINGTON — In 2005, federal authorities concluded that a Monsanto consultant had visited the home of an Indonesian official and, with the approval of a senior company executive, handed over an envelope stuffed with hundred-dollar bills. The money was meant as a bribe to win looser environmental regulations for Monsanto’s cotton crops, according to a court document. Monsanto was also caught concealing the bribe with fake invoices.

John Ashcroft, left, with Timothy Dickinson, a lawyer who has served as a monitor in deferred prosecution agreements for the Justice Department, at a House hearing last month.

A few years earlier, in the age of Enron, these kinds of charges would probably have resulted in a criminal indictment. Instead, Monsanto was allowed to pay $1 million and avoid criminal prosecution by entering into a monitoring agreement with the Justice Department.

In a major shift of policy, the Justice Department, once known for taking down giant corporations, including the accounting firm Arthur Andersen, has put off prosecuting more than 50 companies suspected of wrongdoing over the last three years.

Instead, many companies, from boutique outfits to immense corporations like American Express, have avoided the cost and stigma of defending themselves against criminal charges with a so-called deferred prosecution agreement, which allows the government to collect fines and appoint an outside monitor to impose internal reforms without going through a trial. In many cases, the name of the monitor and the details of the agreement are kept secret.

Deferred prosecutions have become a favorite tool of the Bush administration. But some legal experts now wonder if the policy shift has led companies, in particular financial institutions now under investigation for their roles in the subprime mortgage debacle, to test the limits of corporate anti-fraud laws.