I really don't see why a POA does not need to prove they have POA. Must prove it to the bank. Must prove it to Doctor's and Hospitals. If my brothers had questioned it, I would have proved it. How is someone going to know if you have the legal right to handle someone's finances if you don't show proof.
If done by a lawyer, it will show his Name and Address. It will have the principles signature, lawyers signature, witnesses signature and a Notary stamp with the notaries signature. It will say someting like "I Jane Doe assign my daughter/son as my POA".
Not sure how it will read if taken from the internet but a Notary should be involved.
It may depend on what state the principle lives in (the person who assigned the PoA). Generally, a PoA is under no obligation to "prove" or show the PoA paperwork to anyone. The questioner must get an attorney to write a letter (and have a good reason to need proof) which will threaten them with court action. This forces them to come up with the proof, but then the questioner needs to be prepared to pay for the attorney or any subsequent court actions.
If done by a lawyer, it will show his Name and Address. It will have the principles signature, lawyers signature, witnesses signature and a Notary stamp with the notaries signature. It will say someting like "I Jane Doe assign my daughter/son as my POA".
Not sure how it will read if taken from the internet but a Notary should be involved.