Does anyone have comments or thoughts on point #4: "complete the paperwork"? Obviously, it makes sense to formally quit, and finish any tax and payment relate

Does anyone have comments or thoughts on point #4: "complete the paperwork"? Obviously, it makes sense to formally quit, and finish any tax and payment related papers. But is there a good reason why the employer should request signing any other lengthy contracts at termination? "Our legal department told us to" is the worst kind of argument - lawyers typically push to protect whoever is paying them from anything possible, not to clear up things in a balanced and reasonable manner. And if the employee is leaving, there should not be any loose ends that require additional contracts.