What do we do when a resigning employee files for workers’ comp on his way out?

Q: “I have an employee who gave two weeks’ notice, but filed a workers’ compensation claim five days before his last day, stating that he had been hit on the head by a door, causing head and neck injuries. Does his resignation stand even though there is a workers’ compensation claim pending? And if so, do we have the right to ask the employee not to come back to work for the rest of his two weeks?” – Jenny, Kansas