A letter of intent does not need to be notarized in most situations. The typical LOI is designed to be non-binding, so there is no legal requirement for a notary to verify the signatures, and the document works exactly as intended without one. Notarization becomes worth considering only in a few specific contexts: real estate, high-stakes acquisitions with enforceable carve-outs, certain estate planning uses, and documents headed overseas.
Why Notarization Isn’t Required
A common misconception is that notarizing a document makes it “legal” or more enforceable. It doesn’t. Notarization is an identity-verification process, not a legal review. A notary public confirms that the person signing is who they claim to be and that they’re signing willingly. The notary doesn’t evaluate whether the terms are fair, lawful, or complete. A notarized contract with illegal terms is still unenforceable, and a valid contract without notarization is still binding if it meets the basic requirements of contract law.
What notarization does provide is evidentiary weight. If a dispute later arises over whether someone actually signed the LOI, the notary’s seal and journal entry serve as proof. The notary’s role as an impartial third party makes it harder for a signer to claim the signature was forged or that they never agreed to the document. For most LOIs, that level of proof is unnecessary because the document isn’t creating enforceable obligations in the first place.
When Notarizing an LOI Actually Helps
Real Estate
Real estate is the most common scenario where LOI notarization moves from optional to worth doing. Any document recorded in a county’s public land records must generally be acknowledged before a notary. Most LOIs are not recorded, but if yours contains terms that could be interpreted as creating an interest in property, such as an option to purchase or a right of first refusal, notarization keeps your options open if recording becomes necessary later.
There’s a related concern. If your real estate LOI is detailed enough that a court might treat it as a binding agreement rather than a preliminary document, having it notarized adds a layer of authentication that strengthens your position.
High-Value Business Acquisitions
In large acquisition deals, the LOI often includes binding confidentiality and exclusivity provisions that carry real financial consequences if breached. Confidentiality clauses prevent disclosure of sensitive information exchanged during negotiations. Exclusivity clauses commit the seller not to shop the deal to other buyers for a set period, often 30 to 90 days. If either side breaches, the injured party may seek an injunction or damages, and notarization eliminates one line of defense: “I never signed that.”
Some parties also build notarization into the LOI itself as a condition, treating it as a signal of seriousness at the outset of negotiations. Whether an LOI creates a duty to negotiate in good faith depends on the language used. Courts have held that parties can create such an obligation through specific LOI wording, but it doesn’t arise automatically. If your LOI includes a good-faith negotiation clause and you want it to stick, notarization makes it harder for the other side to walk away from their commitment.
Estate Planning
In estate planning, a letter of intent serves a different purpose. It’s a letter to the trustee of a trust or the executor of a will that offers guidance on how the person wants their assets handled. These letters are not intended to be legally binding, and notarizing one won’t change that. Notarization can lend credibility to the document’s authenticity, which matters when family members might dispute what the deceased actually wanted.
A word of caution. An estate planning LOI that gets too detailed risks being treated by a court as an unintended amendment to a will or trust, and notarizing it could strengthen that unintended reading by making the document look more formal than it was meant to be. Have an attorney review the letter before you add a notary seal.
International Transactions
If your LOI will be used in another country, notarization is often just the first step. Documents destined for countries that participate in the Hague Apostille Convention need an apostille certificate from your state’s Secretary of State to be recognized abroad. For countries outside the Hague Convention, you may need authentication from the Secretary of State followed by legalization at the relevant embassy or consulate. Requirements vary by destination, so check before assuming a notary seal is enough.
How to Get an LOI Notarized
The process is straightforward and inexpensive. Notaries are available at banks, credit unions, shipping centers, and law offices, and through mobile services that come to you. Forty-seven states and the District of Columbia now authorize remote online notarization, which lets you complete the process via live audio-video technology without being in the same room as the notary.1National Association of Secretaries of State. Remote Electronic Notarization
Bring a valid government-issued photo ID such as a driver’s license or passport. The safest practice is to sign in the notary’s presence. For a standard notarial acknowledgment, you may sign in advance and then appear before the notary to confirm the signature is yours, but for a jurat, which involves swearing under oath, the notary must watch you sign. LOIs don’t typically require an oath, so an acknowledgment is the usual format.
The notary verifies your identity, confirms you’re signing willingly, and then completes a notarial certificate attached to or embedded in the document. They sign it and apply their official seal. Fees are set by state law and are modest. Most states cap the charge between $2 and $15 per notarial act. Mobile notaries and remote online notarization services typically charge more for the convenience, often $25 to $75 or more depending on the provider and your location.
What Notarization Won’t Fix
Notarization addresses one narrow issue: proving the signer’s identity and willingness. It won’t help if your LOI has other problems. If the terms are vague or leave critical deal points open, a court is likely to treat the document as non-binding no matter how many notary seals it carries. If your LOI fails to specify which provisions are binding and which are not, you’ve created ambiguity that notarization can’t resolve.
The bigger risk with most LOIs isn’t forged signatures. It’s unclear drafting that either accidentally creates binding obligations the parties didn’t intend or fails to protect the provisions they did want enforced. Spending $200 on a notary for a document that needed $2,000 worth of legal review is a common misallocation of resources. Get the language right first. Then decide whether notarization adds anything for your situation.