Tenant Departure and Lease Question

[Lincoln Lewis]

Hi BP,

I was hoping some more experienced folks might have useful advice. I have a property rented month to month with two women renting the place. One didn't have a strong rental history so her father co-signed (he has since passed away they tell me). This young woman (whose father co-signed) gave her 30 days notice. The other woman said that she would be staying. I just got a call from another property manager saying that the two of them applied for another rental. This 2nd woman has not given me her 30 days notice. My question is this : How should the deposit money be distributed? I collected one deposit check, not two but I'm sure they think that each is entitled to half the deposit. How should I deal with this issue? Thank you very much for your time and experience.

Lincoln