Unique legal issue on sale at auction.

[Brian Doebler]

Just bought 10 acres at auction. The "seller" was the POA for the owner. The seller was the wife of the owner of the property. The owner has dementia. Originally this couple went through a divorce and the property was awarded to the husband, they remarry but the property was in his name only. He signs POA over to her at some point and she eventually puts a portion of the land up for sale at auction. The auction was completed and closed....days later the POA passes away. If there is no successor to the POA, and no intent in the will....who signs on behalf of the seller so I can close?