When notarizing a document, the notary has to include the date their commission expires. It has no bearing on the validity of the document.
It depends on what you're asking. I suspect you mean, "How do you get a document notarized?" If so, you take the document to a Notary Public, sign the document in front of the Notary, and show ID. The Notary will stamp, date, and sign the document. You can usually find a Notary at a local bank. A Notary will normally charge you a small fee.
A common law notary public is a public officer appointed by law to serve the public by taking acknowledgments of the signers of such legal documents as deeds, mortgages, agreements and Wills. If a document has been notarized that means it carries the acknowledgment of a notary public at the end of the document. Generally, the notary confirms the identity of the signer, witnesses the signing of the document, confirms the signer is acting of their own free will and dates the acknowledgment.
Personally I would never use this phrase, but those who do mean a photocopy of a document that has been certified by someone (not infrequently a Notary Public but it doesn't have to be) as a true copy.
On insurance papers, signed at state simply means the person who is purchasing the insurance signed the legal document. These usually need to be signed in front of a notary.
Assuming you mean what place you can get a document notarized ... post office, bank, most law firms will do it for a small charge (possibly free), real estate office, phone book advertiser. If you mean where on the document, it is below the signature (which the notary is in essence saying is really you). You should not sign your document until you are in front of the notary. He/she will look at your i.d. and then watch you sign it.
If a resident of New York has an official Pennsylvania document on which their signature must be notarized AND they are in New York at the time, the New York Notary CAN notarize the form. Just because it is a Pennsylvania form does not mean that a Pennsylvania Notary must perform the task.
Foot Note
A certified document is an official copy of a document that has been verified as a true and accurate reproduction of the original by a qualified authority, such as a notary public or a government agency. This certification often includes a seal or signature indicating its authenticity. Certified documents are commonly required for legal, administrative, or official purposes, such as applying for visas, licenses, or court proceedings.
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Only if the notary is a really close friend or family member who can vouch for the person's signature.Another View: Any document is "legal" unless until it's authenticity is called into question. If the un-notarized signature is challenged there ARE ways to prove that the signature is genuine (i.e.: expert handwriting analysis) but notarizing something is still the best, quickest, and easiest means.