A notary public is a state-appointed, impartial official who witnesses the signing of important documents. The job comes down to three functions: confirming the signer is who they claim to be, watching the signing happen voluntarily, and applying an official seal that makes the document harder to challenge later. Notarizations show up in real estate closings, powers of attorney, sworn affidavits, and a long list of other documents where the identity of the signer has to be beyond dispute.
The Core Duties of a Notary
Every notarization starts with identity. The signer hands over a current, government-issued photo ID, and the notary compares the name, photo, and signature against the person in front of them. If something doesn’t match or the ID is expired, the notary won’t proceed. When a signer has no acceptable ID, most states allow one or two “credible witnesses” who personally know the signer and carry their own valid ID to vouch for the signer under oath.
After identity, the notary confirms the signer understands the document and is signing willingly. Then comes the seal or stamp, which marks the document as officially notarized. The notary also records each act in an official journal, noting the date, the type of document, how the signer was identified, and which notarial act was performed. That journal entry becomes a permanent record that can be checked if someone later disputes whether the signing actually happened.
The Different Types of Notarial Acts
“Notarization” is a single word covering several distinct acts, and the differences matter.
- Acknowledgment. The signer confirms to the notary that they signed the document voluntarily and understand what it does. This is the most common notarial act and is used for deeds, powers of attorney, and most real estate documents. The signer can sign in advance and then appear before the notary to acknowledge the signature.
- Jurat. The signer swears or affirms under penalty of perjury that the document’s contents are true, then signs in front of the notary. Affidavits and sworn statements use jurats. Unlike acknowledgments, the signing itself has to happen in the notary’s presence.
- Oath or affirmation. A spoken declaration, with no document involved, where a person swears to tell the truth. Depositions and certain government proceedings use these.
- Copy certification. The notary certifies that a photocopy is a true reproduction of an original. States vary on which documents qualify, and most prohibit notaries from certifying copies of vital records like birth certificates.
Documents That Commonly Require a Notary
Real estate transactions drive most of the demand. Deeds, mortgage documents, and property transfer agreements almost always require notarization before a county recorder’s office will accept them for filing. Skip the notarization and the document gets rejected at the counter.
Powers of attorney are another frequent reason people seek a notary. Because the document grants someone the legal authority to act on your behalf, the notarization confirms you had the capacity to make that decision and weren’t being coerced. Many financial institutions will refuse to honor a power of attorney that wasn’t notarized.
Affidavits and sworn statements require a jurat because the signer is declaring the contents true under penalty of perjury. Courts and government agencies routinely require notarized affidavits. Loan agreements, certain contracts, and estate planning documents such as trusts also frequently need notarization, though the specific requirements depend on the document type and where it will be used.
What Notarization Legally Proves
Notarization does something specific and valuable in court: it makes a document self-authenticating. Under the Federal Rules of Evidence, a document accompanied by a certificate of acknowledgment from a notary qualifies as self-authenticating, meaning the party introducing it doesn’t need to bring in a witness or produce additional evidence to prove the document is genuine.1Legal Information Institute. Federal Rules of Evidence Rule 902 – Evidence That Is Self-Authenticating The opposing side can still challenge the document, but the burden shifts to them to produce evidence of a problem rather than requiring you to prove the document is real.
This is where people get confused about what a notary’s seal does and doesn’t guarantee. The seal confirms the signing process was legitimate: the right person signed, they did so voluntarily, and they were identified. It says nothing about whether the contents of the document are true or whether the underlying agreement is fair. A completely one-sided contract is still notarizable as long as the signer understands what they’re signing and does so willingly.
What a Notary Public Cannot Do
The biggest misconception about notaries is that they are a kind of low-cost legal professional. They are not. A notary who isn’t also a licensed attorney cannot give legal advice, explain what a document means, help you decide which type of notarization you need, or draft legal documents. In many states, a non-attorney notary who provides legal guidance is committing the unauthorized practice of law, which is a criminal offense.
Notaries also can’t certify that a document’s contents are true or accurate. Their role is limited to the signing process. They won’t review your contract for fairness, tell you whether a power of attorney is written correctly, or fill in blank fields on your forms. If you need help understanding or preparing a legal document, you need an attorney. The two roles overlap in some countries, but in the United States they are entirely separate unless the same person happens to hold both credentials.
When a Notary Must Refuse
Notaries aren’t just allowed to refuse service in certain situations; they’re required to. A notary who proceeds despite red flags risks losing their commission and facing personal liability.
A notary must refuse if the signer:
- Isn’t present. For traditional in-person notarization, the signer has to be physically in front of the notary. No exceptions.
- Can’t be identified. No valid photo ID and no credible witness means no notarization.
- Appears confused or coerced. If the notary has any reason to believe the signer doesn’t understand the document or is being pressured, they must stop.
- Refuses a required oath. For jurats and other sworn documents, the signer has to be willing to swear or affirm. Declining means the notarization can’t proceed.
A notary must also refuse if the document appears incomplete, contains blank spaces that should be filled in, or looks fraudulent or illegal. Notaries can’t notarize documents where they are a named party or stand to benefit financially from the transaction. Most states also prohibit notarizing for close family members such as a spouse, parent, or child.
Remote Online Notarization
A notary public no longer has to meet you in person everywhere in the country. Remote online notarization lets you connect with a notary over a secure video call. As of early 2025, 45 states and the District of Columbia have permanent laws authorizing the process, with California phasing in its program through 2030.
The process mirrors in-person notarization but adds a technology layer. You join a video conference, present your ID on camera, and may answer knowledge-based identity questions drawn from your personal records. The notary watches you sign electronically and applies a digital seal. The entire session is recorded, and most states require notaries to store those recordings securely for five to ten years. A federal bill called the SECURE Notarization Act has been introduced in multiple sessions of Congress to create uniform nationwide standards; as of its latest action in March 2025, it was referred to committee and hasn’t been enacted.2Congress.gov. H.R.1777 – 119th Congress (2025-2026): SECURE Notarization Act Until federal legislation passes, each state’s own rules govern whether and how remote notarization works.