(My answer to this question at Quora.com)
The landlord will phone you and say:
I don’t know where you are, but what I do have are a very particular set of skills. Skills I have acquired over a very long career. Skills that make me a nightmare for people like you. If you pay the rent now, that’ll be the end of it. I will not look for you, I will not pursue you. But if you don’t, I will look for you. I will find you. And I will demand that you pay up, eh?