Selling expired groceries may not be enough to file a personal injury lawsuit against the grocery store. However, if the grocery store sold expired food that caused you to get sick, the store may be liable for any injuries. Under product liability laws and/or negligence laws, the grocery store may be responsible for selling or providing contaminated food that resulted in harm to the customer. The manufacturer or supplier of the product may also be liable. If you purchased expired food from the grocery store you may be able to return your purchase to the store for a refund. If the store does not offer a refund, you may be able to file a lawsuit in small claims court.