It appears that the POA was executed in Arizona, but not signed by witnesses or notarized there. Is that correct? Where is the house located? In general, California will recognize a POA that was validly executed in a sister state, assuming the POA grants the power to sell property. Generally also, POAs that deal with real estate must be notarized. I'm not an attorney licensed in Arizona.
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I am licensed to practice law in California, and I am not licensed to practice law in Arizona. However, I do have a license in AZ as a Certified Legal Document Preparer. I have attached a link below to the statute on POA's in AZ.
My understanding of the statute is that you essentially need a witness and a notary. Further, there is specific language to be used in the witness acknowledgement. As a CLDP practitioner in AZ for three years before moving to CA to practice law, I prepared hundreds of POA's. Each one contained two witnesses and a Notary as a matter of policy.
I would suggest you consult with an attorney regarding the validity of the document, as well as the source of the document.
Best of luck!
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