Employees at Quebecor World's Versailles, KY, plant and the Graphic Communications International Union filed seven new charges against the print giant last week with the National Labor Relations Board.
The workers alleged that the company unlawfully used security guards to spy on employees, physically harassed workers who support forming a union and restrained workers' ability to discuss a union with other employees.
Quebecor workers are trying to unionize through GCIU as part of the Justice@Quebecor campaign, which began in December. Quebecor, Montreal, is the world's second-largest commercial printer and employs 39,000 people in plants worldwide.
"We hope the labor board will find out what Quebecor workers already know -- the company has violated our rights and has broken the law," said Don Butler, who works at the plant in Versailles.
A Quebecor spokesman reached last week denied the accusations.
Quebecor World workers in plants nationwide have previously filed more than 40 charges claiming that the company threatened, harassed and fired workers because they have attempted to unionize.
The labor board is investigating the charges. During past union organizing drives, the federal government found that Quebecor World broke the law by threatening employees with termination if they formed a union and by firing and disciplining workers who supported the union.