California affidavit requirements are unusual: in most situations you don’t need a notary at all. Under Code of Civil Procedure 2015.5, an unsworn written declaration signed under penalty of perjury carries the same legal weight as a sworn, notarized affidavit, provided it contains the exact certifying language, your signature, and the date.1California Legislative Information. California Code of Civil Procedure Section 2015.5 Get the format wrong and the court can disregard the document; lie in one and you face the same perjury exposure as if you had sworn it before a notary.
Declaration or Notarized Affidavit: Which One You Need
For most California court filings, a declaration under penalty of perjury is the default and the notarized affidavit is the exception. CCP 2015.5 permits the swap for any affidavit required under state law, and the resulting declaration has “like force and effect” as a sworn statement.1California Legislative Information. California Code of Civil Procedure Section 2015.5 No notary appointment, no $15 fee, no scheduling.
The tradeoff is where the authentication burden sits. A notarized affidavit shifts some of it to the notary, who verifies your identity and witnesses your oath. A declaration puts it entirely on you: you are personally certifying the truth of your statements under threat of felony prosecution.
The substitution does not work for everything. Depositions, oaths of office, and situations where the law specifically requires appearance before a particular official other than a notary still demand the traditional procedure.1California Legislative Information. California Code of Civil Procedure Section 2015.5 Certain real estate transactions and some probate filings also require actual notarization regardless of the declaration option. If a form or statute specifically calls for a notary, use one.
The Required Language
The single element courts look for first is the closing certification. The statutory wording is substantially:
“I declare (or certify, verify, or state) under penalty of perjury under the laws of the State of California that the foregoing is true and correct.”
That sentence is followed by the date, the place of execution, and your signature.1California Legislative Information. California Code of Civil Procedure Section 2015.5 The statute says “substantially” this form, so minor wording variation does not automatically sink the document. Significant deviation is the most common reason filings get rejected.
If You Sign Outside California
When the declaration is signed anywhere other than within the state, the rules tighten. The document must state the date of execution and must explicitly say it is declared “under the laws of the State of California.”1California Legislative Information. California Code of Civil Procedure Section 2015.5 That reference is what makes the out-of-state signature enforceable in a California court. Leave it out and the declaration can be treated as legally insufficient even if everything else is correct.
Personal Knowledge
Formatting alone is not enough. The substance of the declaration must rest on your personal knowledge, meaning what you actually saw, did, or know firsthand. Statements built on hearsay, speculation, or secondhand information lack evidentiary value, and judges routinely strike them. If a key fact came from someone else, the better practice is to have that person submit their own declaration.
When Notarization Is Actually Required
For documents that genuinely need a notary, whether because a statute requires it or because the filing involves a real estate transfer, California imposes strict procedure.
Identity Verification
The notary must confirm your identity through “satisfactory evidence,” which in California means a qualifying ID. Acceptable forms include a California driver’s license or ID card, a U.S. passport, a valid passport or consular ID from your country of citizenship, an out-of-state driver’s license, a U.S. military ID, a state government employee ID, or a federally recognized tribal government ID. The ID must include your photo, physical description, signature, and an identifying number, and must be current or issued within the past five years.2California Secretary of State. Notary Public Handbook 2022
The Oath and Jurat
Before you sign, the notary administers an oath or affirmation asking you to swear the contents are true. The notary then completes a jurat, the certificate attached to the document confirming that you appeared in person, took the oath, and were properly identified. The standard jurat language is: “Subscribed and sworn to (or affirmed) before me on [date] by [name], proved to me on the basis of satisfactory evidence to be the person who appeared before me.”3CA.gov. Notary Jurat
A notary cannot vouch for the accuracy of what your affidavit says. The notary verified you, not your statements. The truth of the content is still your responsibility.
Fees
The maximum fee a California notary can charge is $15 per jurat and $15 per acknowledgment.4California Secretary of State. Notary Public Handbook 2019 – Fees A notary who charges more is violating the law. Mobile notaries who travel to you may add a separate travel fee, which is not subject to the $15 cap.
Requirements for Specific Types of Affidavits
Different filings add their own requirements on top of the baseline format.
Small Estate (Heirship) Affidavits
When someone dies without a will, heirs can sometimes claim property without full probate by filing a small estate affidavit under Probate Code 13101. The shortcut is available when the gross fair market value of the deceased person’s California property, excluding certain exempt assets, does not exceed $208,850 for deaths occurring on or after April 1, 2025.5California Courts. DE-300 Maximum Values for Small Estate Set-Aside and Disposition The threshold is adjusted periodically under Probate Code 890, so confirm the current figure before filing.6California Legislative Information. California Probate Code 13101 The affidavit must identify the deceased, list family relationships, name the potential heirs, affirm no one else has a superior claim, and be accompanied by a death certificate.
Financial Declarations in Family Law
In divorce and child support cases, Family Code 2104 requires both parties to make preliminary disclosure of income, expenses, assets, and debts through sworn financial declarations. Custody and support calculations depend on the figures reported, and judges treat accuracy as non-negotiable. False or incomplete disclosure can trigger contempt charges, monetary sanctions, modified orders, attorney’s fees, and perjury prosecution.
Proof of Service
When legal documents are delivered to another party, the person who made the delivery signs an affidavit or declaration confirming who was served, when, where, and how. California state courts accept a declaration under penalty of perjury. In federal court, proof of service must be made by the server’s affidavit unless a U.S. marshal handled delivery.7Legal Information Institute (LII) at Cornell Law School. Rule 4 – Summons A defective proof of service can delay a case even when the delivery itself was done correctly.
Federal Court Uses Different Language
If your filing is in federal court, the required declaration language is not the same as the California version. Under 28 U.S.C. § 1746, federal courts accept unsworn declarations signed under penalty of perjury, but the formula for a document signed within the United States is: “I declare (or certify, verify, or state) under penalty of perjury that the foregoing is true and correct. Executed on (date).”8Office of the Law Revision Counsel. 28 U.S. Code 1746 – Unsworn Declarations Under Penalty of Perjury For a document signed outside the United States, you add “under the laws of the United States of America.”
The federal formula omits any reference to California law. A declaration that uses only the CCP 2015.5 wording may not satisfy a federal filing requirement, and the reverse is also true. When a matter involves both state and federal filings, include both certifications or match the exact language to the court where each document is going.
Why Affidavits Get Rejected
Most rejections are mechanical, not substantive, and almost all of them are preventable.
- Missing or altered penalty-of-perjury language. Meaningful deviation from the CCP 2015.5 formula is the most frequent problem. Forgetting “under the laws of the State of California” when signing from out of state is a common version.
- No date or signature. Either deficiency can get the declaration disregarded.
- Wrong names or case numbers. Clerical errors in the caption or body create ambiguity, and courts will not guess.
- Hearsay and speculation. “I was told that…” and “I believe it’s likely that…” get struck.
- Improperly attached exhibits. Each exhibit should be labeled, numbered, and specifically referenced in the body of the declaration.
The facts may be true and relevant, but a format problem can stop the court from considering them. That hurts most when you are up against a filing deadline.
Penalties for a False Declaration
A declaration under penalty of perjury carries the same legal weight as a sworn affidavit, which means lying in one has the same consequences. Under Penal Code 118, perjury is the willful statement of something known to be false, under oath or under penalty of perjury, on a point material to the proceeding. The prosecution must prove both the knowledge of falsity and the materiality.
Perjury is a felony punishable by two, three, or four years in state prison under California’s determinate sentencing scheme.9California Legislative Information. California Penal Code 126 A conviction creates a permanent criminal record and can affect employment, professional licensing, and immigration status. For attorneys, perjury is a crime of moral turpitude and can lead to disbarment.
Civil consequences stack on top. A false affidavit that causes financial harm can expose you to damages. In family law, lying about income or assets can trigger sanctions, modified orders, contempt proceedings, and attorney’s fees.
Remote Online Notarization Is Not Yet Available
As of 2026, California does not yet allow remote online notarization. The state’s Online Notarization Act establishes a framework but is not scheduled to become fully operative until January 1, 2030. Legislation such as AB 1977 has been introduced to adjust the timeline and refine the rules, but until the Secretary of State finalizes implementing regulations, every California notarization must still be done in person.
If you need a notarized document and cannot easily appear in person, the usual options are a mobile notary who travels to you, or, where the filing allows it, a declaration under penalty of perjury instead of a notarized affidavit.