A notary public is a state-appointed, impartial official whose job at a signing is narrow and specific: verify who you are, confirm you are signing willingly, administer an oath if the document calls for one, and apply an official seal that gives the paperwork added legal weight. The notary is not reviewing your document, approving it, or giving you advice about it. If you are wondering what does a notary do when you sit down across the table, that short list is essentially the whole job.
The seal matters because of what it unlocks later. Under the Federal Rules of Evidence, a document carrying a proper notarial certificate of acknowledgment is “self-authenticating” and can be admitted in federal court without extra proof that the signature is genuine.1Cornell Law Institute. Federal Rules of Evidence Rule 902 – Evidence That Is Self-Authenticating That presumption is why lenders, courts, and agencies insist on notarization for the paperwork they take seriously.
The Three Things a Notary Actually Does
Checks Your Identity
This is the single most important task. The notary examines a current government-issued photo ID, typically a driver’s license, state ID card, or U.S. passport, and compares the photo, physical description, and signature against the person in front of them. If the name on the ID doesn’t match the name on the document, or the ID looks altered or expired, the notary can refuse to proceed.
If you don’t have acceptable photo ID, many states let you use “credible witnesses,” people who personally know you and will vouch for your identity under oath. Rules differ by state. Some accept a single witness who knows both you and the notary; others require two witnesses who know you and bring their own valid IDs. A credible witness can’t be named in the document or stand to benefit from it.
Confirms You’re Signing Willingly and Knowingly
The notary also has to be satisfied that you understand what you’re signing and are doing it of your own free will. If a signer seems confused, pressured, or unable to communicate, the notary should decline. That safeguard matters most on documents like powers of attorney and wills, where a vulnerable person could be pushed into handing over control of money or property.
Administers an Oath or Affirmation When Required
Notaries can place a signer under oath or affirmation, a verbal pledge that what you’re stating is truthful, given under penalty of perjury. An oath invokes a higher power; an affirmation carries the same legal force without the religious reference. Courts and agencies rely on this when they want sworn documents like affidavits and depositions.
This step is tied to the type of notarial certificate on your document. A jurat means you swore or affirmed to the truth of the contents, and you must sign in front of the notary. An acknowledgment is lighter: you’re confirming to the notary that you signed knowingly and voluntarily, and in that case your signature can predate the appointment. Using the wrong certificate can get your document rejected by the agency that asked for it, so check their instructions before you go.
What a Notary Is Not Doing
A lot of the misunderstanding around notarization comes from assuming the seal means more than it does. It doesn’t.
A notary who isn’t also a licensed attorney cannot practice law. They can’t draft your document, explain what a clause means, tell you whether to sign, or warn you about legal consequences. That line is called the unauthorized practice of law, and crossing it can cost the notary their commission and bring fines or criminal charges depending on the state.
A notary also cannot notarize their own signature or any document where they are a named party or stand to benefit financially. Many states extend the restriction to immediate family: a spouse, parent, or child. A notarization that breaks these rules can be voided outright, and the notary can face revocation and civil liability.
And the seal does not certify the content of the document. It confirms that you appeared, showed valid identification, and signed voluntarily. The notary did not verify that the statements inside are true, that the document is legally sound, or that it will accomplish what you want. Even on a jurat, the notary is certifying that an oath was administered, not that what you swore to is actually accurate.
Documents That Typically Need a Notary
Not every piece of paper needs a seal, but these commonly do:
- Real estate documents: Deeds, mortgages, and closing packages, because they transfer ownership and involve significant money.
- Powers of attorney: Notarization helps show you willingly handed authority to someone else and understood its scope.
- Wills and trusts: Requirements vary by state, but notarization adds a layer of protection against later challenges.
- Affidavits: Sworn written statements for court or government filings usually need a jurat.
- Loan and business documents: Mortgage closings in particular are often handled by notary signing agents, who are notaries with extra training for loan packages.
How to Prepare for the Appointment
A little preparation prevents a wasted trip. Bring a current, government-issued photo ID that shows your signature and physical description. Most states accept a driver’s license, state ID, U.S. passport, or military ID. If yours is expired, check your state’s rule first: some accept recently expired IDs, others don’t.
Don’t sign the document ahead of time unless you’re sure an acknowledgment is all that’s needed. For a jurat, you have to sign in the notary’s presence. If multiple people need to sign, try to bring everyone to the same appointment, each with their own valid ID; the notary has to verify each signer individually.
At the appointment, after checking your ID and confirming you’re signing freely, the notary records the transaction in an official journal: date, type of notarial act, document title, and the names involved. Many states require this journal, and it becomes an important backup if the signing is ever questioned later. The notary then applies their seal, which shows their name, state, and commission expiration, and adds a handwritten signature to the certificate.
Fees are capped by state law and vary widely. Standard per-signature fees run from about $2 in some states to $25 in others. Mobile notaries who come to you can add travel charges on top of the statutory fee, and those travel fees generally aren’t capped, so ask about the total before you book.
Remote Online Notarization
You may not need to meet in person. Remote online notarization, usually called RON, lets you appear before a notary over a live two-way audio-video call. More than 40 states and the District of Columbia have enacted permanent RON laws. If your state allows it, you can get documents notarized from home, a hospital room, or abroad, as long as you can clear the identity checks.
Those checks are more involved than at an in-person appointment. You typically:
- Hold your government-issued ID up on camera so the notary and the platform’s credential-analysis software can examine its security features and compare the photo to your live video.
- Answer a short knowledge-based authentication quiz, usually five questions pulled from public and private records about your personal history, with a passing threshold of at least four correct answers inside a two-minute window.
- Apply an electronic signature within the platform, after which the notary applies a digital seal and electronic signature.
The entire session is recorded. Both the recording and the electronic journal entry must be stored under state record-retention rules, often for at least ten years. That creates a more complete evidence trail than a traditional in-person signing, which can make a RON transaction easier to defend if a dispute comes up later.