IBM required older workers it laid off to give up their rights to bring age discrimination suits despite not providing certain information about the larger group being laid off, a new class action in the Southern District of New York alleges.

The Older Workers Benefit Protection Act explicitly requires that a company provide demographic information about other workers being laid off in order to extract a waiver of rights from departing workers. Courts have held those waivers to be invalid if the company doesn’t comply with OWBPA’s minimum standards.

In a lawsuit filed March 27, four former IBM workers say...