XI. Dion is an Accounting Supervisor in a trading company. He has rendered exemplary service to the company for 20 years. His co-employee and kumpadre, Mac, called him over the phone and requested him to punch his (Mac's) daily time card as he (Mac) was caught in a monstrous traffic jam. Dion acceded to Mac's request but was later caught by the Personnel Manager while punching. Mac's time card. The company terminated the employment of Dion on the ground of misconduct. Is the dismissal valid and just? Explain. (5%)