I have a medical records request form and I need someone to sign as a witness. My first thought is that I should have a notary do this.
Is this legal?
It's not necessary to have a notary public witness and notarize the signature of a witness on a medical request form, unless the form states that it requires a notary and a notarized signature of a witness.
It is legal to have anyone acting in a legal capacity (over 18, not legally incapacitated, etc.) sign as a witness. Sometimes this is as simple as someone at the medical office or your next door neighbor.
As an aside, it's legal to have a notary sign as a witness on a medical records request form as a non-notary; but why bother to go that route?
https://en.wikipedia.org/wiki/Notary_public
Earlier answer on LSE: Who should witness a medical records request form?