Mold growing, who is responsible

[Donny Widjaja]

Hi,

My tenant just informed my yesterday there is mold growing on the bathroom wall next to the bathtub.  From the picture that she sent to me, it seems like the mold has been there for a while.  

I contacted ServPro, a mold remediation company, and they said they can provide a free consultation.  However, I'm also worried that there might be mold somewhere where it is not visible.  

I'm not sure what should be my action.  Can I just get a contractor to scrap those mold on the wall?  Should I get a professional mold remediation like ServPro?  Should I get a professional mold inspector to make sure there is no mold in other places?

What's the best plan to ensure I can protect my rental house, and provide a safe environment for the tenant, without costing me too much money.

Finally, who is responsible for paying for the repairs?  I see this as a tenant negligence for not reporting earlier, and keeping the bathroom wet and damp.  

Thanks,

Donny