If an employee is injured because of the actions of someone who does not work for the same company, the employee can sue that person, claiming third-party liability. This situation can also apply to the manufacturer of a machine or power tool the employee was using at work that caused the accident. Under these cases, the worker and their lawyer will have to prove that the actions of this third party or their lack of action led directly to the injury. If the lawsuit is successful, the liable party’s insurance will have to pay for the worker’s expenses.