WorldCom former chief financial officer Mr Scott Sullivan and former accountant Mr Buford Yates pleaded not guilty to all charges against them in a US securities fraud case before a federal judge.
Mr Yates was ordered to post a bail bond of $500,000 and surrender his passport. His travel was restricted to two jurisdictions in New York and the entire state of Mississippi.
Bail had previously been set for Mr Sullivan.
A US attorney said the government is continuing its investigation of WorldCom's $7.2 billion profit restatement and plans to add additional charges against the two defendants.
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No trial date was set because of the new charges.