Please Help! Who signs the purchase-agreement when their is a power of attorney?

[Reginald S.]

I have a seller that's helping her parents sell their home to me. She has power of attorney over them both. My Questions is:

1. Whose name do I put on the purchase-agreement? 

2. Who signs it?

Thanks in advance for all of your valuable advice and expertise.

[Michael Hayworth]

Are you using  title company for this transaction? If so, I'd simply ask them.

(By the way, developing  good relationship with a title company you use over and over again is a real benefit to an investor.)