How to help my tenant

[Galen Bricker]

I have a property with two tenants sharing a single family house.  The original tenant had a girl friend living with him for a while and when she moved out he had another friend move in. I had him complete the new tenant process and he was approved.  They both owe the rent and utilities together.  My original tenant is now having a difficult time getting his friend to pay his portion of the rent, however he always makes sure that I am paid the full amount.  He asked me if there is anything that I can do to help him get the other tenant's portion on a more timely basis.  I want to help him if I can because he is such a good tenant and really takes care of the place.  I know that since I am being paid the rent it really isn't my problem but I don't want it to become my problem if the original tenant starts to have problems making sure the rent is paid.  

Do you have any ideas how I can help him?