Not all POAs are the same. When you get into escrow, ask the company handling the escrow to write up a POA for the particular property in question. You'll need to sign and notarize the document and get the original copy back to your escrow company. Often times, you will be able to go to an affiliate escrow branch in your location, to have the document notarized.
Or, if you have access to the Internet in your location, ask your agent to use Docusign, or other electronic signature software, to electronically send you documents to sign all the paperwork. Many escrow companies will accept electronic signatures on their paperwork, making the document signing process quick and painless from any location.
Irene - La Jolla, CA
It's not where the POA was executed that matters, but rather the type of POA. Lenders usually require a specific power of attorney rather than a general power of attorney. You should speak with your lender to let them know what your situation in and why you will need to use an attorney-in-fact. Your lender will want to review the POA to make sure it is acceptable.