Notarization is the process in which a state-commissioned officer, called a notary public, confirms that the person signing a document is who they claim to be and is signing willingly. The notary doesn’t approve what the document says or guarantee it’s legal. By adding a seal and signature, the notary creates an official record that the right person signed under the right circumstances, and that’s why courts, county recorders, banks, and foreign governments treat notarized signatures as more trustworthy than ordinary ones.
What a Notary Actually Verifies
A notary public is appointed by a state’s executive branch, usually through the secretary of state’s office, and serves a fixed commission term that varies by state. Most states set a four-year term, though some run as short as two years and one state grants lifetime commissions.
During any notarization, the notary’s job is narrow and specific. Confirm the signer is physically present, or present over live audio-video for remote online notarizations. Verify identity using government-issued photo identification. Assess whether the signer appears to be acting voluntarily and understands, in a basic way, what they’re doing. If something seems off, signs of confusion, intoxication, or pressure from a third party, a careful notary will decline to proceed.
Impartiality is a strict requirement. Federal regulations reflect the longstanding public policy that a person with a financial or beneficial interest in a transaction should not notarize documents related to it, and notaries are cautioned to be especially careful when family members are involved.1eCFR. 22 CFR 92.31 – Disqualification of Notarizing Officer
Notaries also are not lawyers. They cannot explain what a document means, advise someone on whether to sign, or choose the type of notarial act for a signer. Crossing that line is the unauthorized practice of law and can cost a notary their commission. This is a particular trap in communities where “notario público” means something very different: in many Latin American countries, a notario is a licensed legal professional with far broader authority than a U.S. notary. Some states impose specific civil penalties on notaries who use titles like “notario” to imply they can provide legal services.
What Notarization Does Not Do
Here’s the biggest misconception: that a notary’s seal makes a document valid, enforceable, or fair. It doesn’t. Notarization certifies that the signer’s identity was verified and that they appeared to sign voluntarily. A contract with illegal terms is still illegal after notarization. A deed signed under fraud is still fraudulent. The seal authenticates the signature, not the substance of the document.
What notarization does do is practical and real. It deters forgery, because a would-be forger has to appear in person before an official record-keeper and present identification. It adds a layer of verification against identity theft that a bare signature can’t provide. And it offers some protection for vulnerable signers, because the notary is trained to watch for coercion or lack of capacity.
The Main Types of Notarial Acts
Not every notarization works the same way. The type of act determines what the notary is certifying and what the signer has to do.
Acknowledgments
In an acknowledgment, the signer declares to the notary that they signed the document voluntarily. The notary verifies identity, hears the declaration, and completes a certificate confirming it. In most states, the signer doesn’t need to sign in front of the notary; they can arrive with a pre-signed document and acknowledge the signature as their own. Acknowledgments are the standard act for real estate deeds, powers of attorney, and similar property-related documents.
Jurats
A jurat is more formal. The signer must take a spoken oath or affirmation swearing that the contents of the document are true, and must sign in the notary’s presence. A pre-signed document is not acceptable. Because the signer swears to truthfulness under penalty of perjury, false statements have real legal consequences. Affidavits and sworn statements typically require jurats.
Oaths and Affirmations
Oaths and affirmations can also stand alone, without any written document. Swearing in a public official or administering testimony for a legal proceeding are common examples. An oath invokes a higher power; an affirmation is the secular equivalent. Both carry the same legal weight as courtroom testimony.
Copy Certifications
For a copy certification, a notary compares a photocopy against the original and certifies the copy is accurate and complete. This comes up often for diplomas, professional licenses, and similar records needed for employment or immigration. One important limit: notaries generally cannot certify copies of vital records like birth, death, or marriage certificates. Only the agency that issued the original can produce a certified copy of those. Most states also prohibit notaries from copy-certifying court records such as divorce decrees.
Signature Witnessing
A signature witnessing looks similar to an acknowledgment but works differently. The notary must personally watch the signer put pen to paper. The signer, however, doesn’t need to make any verbal declaration. Not every state authorizes this act, so check your state’s rules before assuming any notary can perform one.
Why a Notarized Document Carries Weight
Self-Authentication in Court
Under Federal Rule of Evidence 902(8), a document accompanied by a certificate of acknowledgment executed by a notary public is self-authenticating. That means it can be admitted in evidence without anyone having to testify that the signature is genuine.2Office of the Law Revision Counsel. Federal Rules of Evidence, Article IX – Authentication and Identification The advisory notes to the rule observe that if notarized authentication is sufficient for documents as important as property titles, logic demands the same treatment for less significant documents.3Legal Information Institute. Federal Rules of Evidence Rule 902 The notary’s seal substitutes for live testimony about authenticity, which saves time and expense in litigation.
Presumption of Regularity
Courts apply what lawyers call a “presumption of regularity” to notarized documents. If a document bears a valid seal and certificate, the court assumes the notarization was performed correctly unless someone presents strong evidence otherwise. That shifts the burden of proof. The person challenging the document has to show something went wrong, rather than the person relying on it having to prove everything went right.
Recording
Many legal instruments cannot be filed with a county recorder’s office unless they’ve been notarized. Deeds, mortgages, and long-term leases typically fall into this category. Recording creates a public record of ownership and liens, which is essential to maintaining clear title. Without notarization, these documents generally won’t be accepted for recording, and the public notice that protects buyers and lenders disappears with them.
When Notarization Goes Wrong
A flawed notarization doesn’t automatically void the underlying document, but it can create serious problems. If a notary failed to verify the signer’s identity or never confirmed the signer was physically present, a court may refuse to accept the document as self-authenticating. The document might still be valid between the parties who signed it, but it loses the evidentiary advantages that proper notarization provides. In real estate, a defective notarization can cloud title and require corrective action, sometimes a new signing, sometimes a court order. The practical lesson: if you spot an error on a notarial certificate, wrong date, misspelled name, missing seal, get it corrected right away rather than hoping no one notices.
Remote Online Notarization
Remote online notarization, commonly called RON, lets a signer and notary complete the process over a live audio-video connection instead of meeting in person. As of 2026, 49 states and Washington, D.C. permit some form of remote notarization, so nearly every American has access to it. The option expanded during the COVID-19 pandemic and has stuck.
RON sessions include identity safeguards that go beyond a traditional in-person notarization. The signer typically has to pass two layers of verification:
- Credential analysis. The signer uploads images of a government-issued ID, which automated software checks for security features and authenticity.
- Knowledge-based authentication. The signer answers computer-generated questions drawn from their personal financial and credit history, questions only the real person should be able to answer. A common standard requires correctly answering at least four of five questions within two minutes, though state requirements vary.
Every RON session must be recorded. Most states require the notary or the technology platform to retain the audio-video recording for at least ten years, which produces a far more detailed evidentiary record than any ink stamp and journal entry. That recording requirement is one reason RON is sometimes considered more secure than in-person notarization, despite initial skepticism about remote verification.
Using a Notarized Document in Another State or Country
A document notarized in one state is generally recognized as valid in every other state. Most states have enacted interstate recognition laws, many based on the Revised Uniform Law on Notarial Acts or similar model legislation. The core principle: the validity of a notarial act is determined by the law of the state where it was performed, not the state where the document ends up being used. If a notary in State A followed State A’s rules, State B will accept the notarization even if State B’s rules differ. Specific recording offices sometimes have their own formatting requirements, but those are separate from the notarization itself.
Using a notarized document in another country takes an extra step. For the more than 120 countries that participate in the 1961 Hague Apostille Convention, you need an apostille, a standardized certificate attached to the document that confirms the notary’s authority is genuine. For documents notarized under state authority, the apostille comes from that state’s secretary of state. For federal documents, it comes from the U.S. Department of State.4USAGov. Authenticate an Official Document for Use Outside the U.S. For countries outside the Hague Convention, a more involved authentication process through the State Department may be required. Either way, the notarization is only the first step; the apostille or authentication certificate is what makes foreign authorities trust it.
What It Costs
Most states cap what a notary can charge per act, and the caps are modest. Statutory maximums for standard acts like acknowledgments and jurats typically fall between $5 and $25 per signature, though roughly a dozen states set no specific cap and a few set certain fees at zero for particular act types. Mobile notaries who travel to the signer commonly add a separate travel fee on top of the statutory charge, and that travel fee usually isn’t capped. RON fees tend to run higher than in-person fees because the technology platform charges its own fee in addition to the notary’s, so expect to pay $25 or more for a remote session.