12.1 When Signature by Mark Is Appropriate

What a Signature by Mark Is

An 87-year-old woman sits across from you, hands trembling. She needs to sign a power of attorney, but advanced arthritis has made writing her name impossible. California Civil Code section 14 answers her question: when a person cannot write (sign) their own name, they may sign "by mark" — typically an "X" — and that mark, properly witnessed, has the same legal force as a written signature.

This is not a courtesy or a convenience. It is a specific statutory accommodation, and a California notary must know exactly when it applies and when it does not. The 2026 notary exam (45 questions, 40 scored, 70% to pass, administered by CPS HR Consulting) commonly carries 1–2 items on signature by mark, often blended with identification and journal rules.

Who May Use a Signature by Mark

The trigger is simple: the signer physically cannot write their own name. The reason can be permanent or temporary.

Notice the common thread: a genuine inability to form letters. The accommodation exists for the body, not for preference.

When a Mark Is NOT Appropriate

A signer may not use a mark simply because:

• They prefer not to write out their full legal name
• They are rushed or impatient
• They want to use initials instead of a full signature
• They are mentally incapacitated (a mark cannot cure a lack of understanding)

Exam Trap: The most-tested distinction is between physical inability and mental incapacity. Inability to write does NOT mean inability to understand. A blind, illiterate, or paralyzed signer who clearly understands the document is a perfect candidate for signature by mark. A confused dementia patient who cannot grasp the document is not — the notary must refuse regardless of physical ability.

The Mark Itself

The mark need not be the letter "X," though that is the most recognized form:

• An "X" is conventional and instantly understood
• Any intentional symbol the signer can produce qualifies (a slash, a circle, an initial-like stroke)
• The mark must be made voluntarily by the signer's own action, not by anyone else's hand guiding theirs
• A mark made with the mouth or foot is acceptable if that is the only method the signer can manage

Unlike some states, California does not treat a thumbprint as the "signature mark" for the document; the thumbprint requirement in the journal is a separate rule for certain real-property documents. For signature by mark, focus on the intentional symbol the signer makes.

Mark vs. Other Accommodations — Don't Confuse Them

The exam likes to test signature by mark against three look-alike situations. Memorize the differences:

A single appointment can stack these — an illiterate, non-English-speaking signer may need an interpreter AND a signature by mark AND credible-witness identification all at once. Each requirement is satisfied independently; none cancels another.

Worked Example

A signer is recovering from a stroke that paralyzed her writing hand. She presents a valid California driver license, speaks clearly, and explains that the document is her advance health-care directive. Walk the analysis: identity is satisfied by the license under section 1185; competence is satisfied because she understands the directive; willingness is present. The only barrier is penmanship — exactly what Civil Code section 14 cures. She qualifies for signature by mark. Had she instead been heavily sedated and unable to track the conversation, competence would fail and the notary would refuse, regardless of the paralysis.

What Still Applies

A signature by mark waives only the act of penmanship. Everything else a California notary normally does still applies:

• Identity: established by personal knowledge or satisfactory evidence under Civil Code section 1185 (acceptable ID or credible witnesses)
• Competence: the signer must understand the document
• Willingness: the act must be free and voluntary
• Journal and certificate: completed as in any notarization, plus the added witness steps in 12.2

The shorthand to memorize: a mark replaces the signature, nothing else.

Quick Self-Check

Before proceeding with any mark, run this four-question gate:

1. Can the signer write their name? If yes, no mark is needed — have them sign normally.
2. Does the signer understand the document? If no, refuse.
3. Is the act free and voluntary? If coerced, refuse.
4. Is identity established under section 1185? If no, resolve before continuing.

Only when the answers are no, yes, yes, yes does signature by mark become the correct path. This gate keeps you from misclassifying a hurried signer (who can write) or an incapacitated signer (who cannot understand) as a mark candidate — the two errors the exam most rewards you for avoiding.