I have no idea. But.... When we bought our house, I had a series of conversations with our realtor who is also a church friend.So would a title company accept POA without a physicians certificate?
He gave me the distinct impression that agents, loan companies, title companies, lawyers etc. from either the selling or the buying side really and truly don't like weird or strange circumstances regarding property.
Not only are there criminal concerns, but I think there is a real fear from pros that strange things tend to snowball into complex legal or administrative headaches. Headaches then take time and energy to resolve. In contrast, the pros like to be in and out of a transaction fast.
So....as an added complexity being able to accept something legally might not mean that they would be actually willing to do so.