G.B.
Actually they aren't worth the paper they are written on anymore.
You need to go to your child's physicain and the local hospital, anywhere they might go for medical attention and fill out medical consents there. If a paper isn't notarized and legally filed anyone could say it was written by you and take your child to doctors and you might not even know. Since the privacy laws changed they just don't hold any authority anymore. There is federal law that changed regarding a limited authority type of "permission to treat" paper now too. You both go before a judge and they sign a paper that is legally filed in the court house that gives certain people to seek medical, and whatever other authority you want to allow them.
I have guardianship of my grandkids and attend a Grandparents Raising Grandchildren group. We have an attorney who is on several government committees that writes the new laws and there were over 400 pages of new law last year regarding grandparents. This paper I am referring to is one of the new laws. It allows the grandparents limited authority to do the assigned things in your absense. It shouldn't be expensive but until you revoke it they have the authority you allow.
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P. S. A friend of mine who is a professor of nursing had to fly out of town to attend her mom's funeral and her daughter cut her foot on a ceramic tile in my yard. We had a signed letter at the Pediatricians office but not the hospital, we had a permission to treat letter too. And everyone at the hospital knew who we were and the mom because she had student nurses in their hospital every sememster. They knew us too. They wouldn't treat her child and called a judge to order the treatment. They just will not be setting themselves up for lawsuits with all the new laws.