If you’re a lawyer, you’re aware of the importance of making sure that your filings are clear and unambiguous for the long and short-term interests of your clients. Many, if not most, important legal documents require notarization. Divorce documents, for example, must be notarized. Automobile bills of sale must be notarized in some states, and while a promissory note generally does not require a notary, it will almost certainly be easier to enforce if the signatures are in fact notarized.
All power of attorney must be notarized, particularly where real estate is concerned, but as with all legal documents, a notary public signature is a wise precaution in this or for any transaction where repudiation is potentially a concern.