For the sake of "searching" and for others reading these threads I am going to chime in on the notary issue.
I AM a notary public.
My only functions in that capacity is to 1) Verify that the person signing a document really is indeed that person, or 2) to certify that a photocopy of a document really is a photocopy of the actual original document....which means that I have to make the photocopy myself, and then certify/notarize it, to assure that it hasn't been altered.
In some ways my function as a notary is kind of huge. IE the certifying photocopied documents since government agencies will accept my certification.
However, when it comes to notarizing signatures its not huge at all...its simply a way to guarantee that a document really was signed by the person who signed it...IE it wasn't a forgery. My notarization doesn't add any legal "umpf" to a document. All it does is ensure that the signature wasn't forged.
If the document has no legal validity then my notarization is worthless. However if its a valid "contract" then my notarization ensures that it really was signed by the contractee.
Which gets back to the whole "family law" issue. Most of the time a notarized piece of paper isn't legally valid under family law, because most of the time it doesn't represent a legally valid "contract".
It could be very useful for minor things....like a parent agreeing to an out of state or country vacation...or a temporary parenting time schedule change (to prove that no contempt took place)..or it could even be valid to show the "intent" of parties...
But the bottom line is that it is not, and never will be a substitute for a court order. That doesn't mean that parents should never notarize temporary/momentary agreements or changes. It simply means that its not a way to avoid going to court.