If an accountant has missed 2 weeks of work in the past 2 months how would a manager handle a situationwould he speak to her or write a memo?

If an accountant has missed 2 weeks of work in the past 2 months how would a manager handle a situationwould he speak to her or write a memo?
First i would like to give him a phone call and then send his matter to authorized department. to futher handle it.