BENTONVILLE, Ark. (CNN) -- Walmart may have a big problem on the busiest shopping day of the year. Workers are planning to stage a walkout on Black Friday.
They're pushing for better pay, fair schedules and affordable health care.
Walmart executives say people who don't show up for work could face consequences.
Now, employees are accusing the retail giant of retaliating against workers who speak out.
Walmart executives deny the allegation. David Tovar, vice president of communications for Walmart U.S. says, "We have a very strict retaliation policy, anti-retaliation policy. If any associates have those concerns, we want to hear about them and we'll take action if there's merit to it. But, again, the fact is that this is a very small contingent of associates propped up by the unions to make these kind of claims."
Walmart has filed a complaint with the National Labor Relations Board in response to the threats of strike.
It accuses the United Food and Commercial Workers Union and it's subsidiary, OUR Walmart, of unlawfully organizing picket lines and other demonstrations in the past six months.
Walmart says the union is trying to force the retailer into collective bargaining even though it is not the official union for Walmart's employees.