[AZ Landlord] What happened when one of the tenant leave the hous

[Ximing Feng]

Hi, Hope this finds you well! :) I am planning to rent my single family house to a group of people. They are one couple and 2 person. They are friends to each other and they are all adults. My questions are:

• Should I ask everyone to sign the lease?
• Can I ask only one person in the group to take charge of paying rent? Or I have to divide the rent and setup payment with each one of them?
• What is going to happen if one of the leave the house? Let's say they don't get along with each other no more. Are the rest of the people responsible for the full amount of the rent?
• Is this regulated by law or should I add special clause in my lease for this kind of situation?

I am asking because someone was asking me what if I just sign the lease with one person in the group. That way no matter what happen to the group, I just turn to this one single person. I am trying to see the trade off. Any help is appreciated. Thank you very much!