Can a power of attorney be used to buy a house or sign a mortgage?

A properly executed power of attorney can let someone sign a purchase contract and closing documents on a buyer's behalf, though a lender and the closing attorney will both review the specific document to confirm it grants that authority clearly. Requirements can be strict, and some lenders want the power of attorney drafted or reviewed well before closing rather than presented at the table. Joel Boss flags this early with any buyer who cannot be physically present for signing.