Frenchman Frederic Desnard, 44, claims that for four years he was expected to carry out "too menial" tasks that were a "descent into hell".
At a result he was left "depressed, destroyed and ashamed" and forced to resign.
Desnard claims that swiftly after he was hired as a manager at Interparfums - a perfume company in Paris - he found himself stripped of his responsibilities until he was left feeling like he "didn't exist".
He told France's BFM television:
"I left for work each day with a desperate, sinking feeling."
"Then when I arrived I would often break down in tears," he continued. "But no one noticed because no one really cared whether I was there or not.
"I was left depressed and ashamed of being paid for doing nothing."But a lawyer representing the firm, Jean-Philippe Benissan, responded:
"Mr Desnard never said anything about being bored during the four-year period.
"And if he actually had nothing to do over all these years, why didn't he mention it?