12.1 When Signature by Mark Is Appropriate
Key Takeaways
A signature by mark is governed by California Civil Code section 14 and is used when a signer cannot write their name
Qualifying situations include physical disability, illiteracy, temporary injury, advanced frailty, or visual impairment
The signer makes an "X" or other intentional mark in place of a written signature
Two witnesses must observe the mark being made and subscribe their names on the document
Identity must still be established by personal knowledge or satisfactory evidence under Civil Code section 1185, and the signer must be mentally competent
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, a scaled score of 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.
| Qualifying Situation | Typical Example |
|---|---|
| Physical disability | Paralysis, severe Parkinson's tremor, missing or amputated hands |
| Illiteracy | Never learned to read or write in any language |
| Temporary injury | Both arms in casts, post-surgical hand recovery, severe burns |
| Advanced frailty | Age-related loss of fine motor control |
| Visual impairment | Blindness preventing the forming of a legible signature |
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:
| Accommodation | When Used | Who Acts |
|---|---|---|
| Signature by mark | Signer cannot write but understands the document | Signer makes the mark; two witnesses subscribe |
| Credible witness ID | Signer can sign but lacks acceptable ID | One or two credible witnesses establish identity only |
| Document translation needed | Signer needs help understanding document contents | Independent translation does not replace direct notary-signer communication for the notarial act |
| Refusal | Signer lacks understanding, willingness, or identity | Notary declines entirely |
An appointment may combine a signature by mark, independent document translation and credible-witness identification. Each serves a different purpose. California still requires the notary to communicate directly with the signer for the notarial act; an interpreter cannot replace that exchange. If direct communication is impossible, decline and refer the signer to a notary who speaks the same language.
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:
- Can the signer write their name? If yes, no mark is needed — have them sign normally.
- Does the signer understand the document? If no, refuse.
- Is the act free and voluntary? If coerced, refuse.
- 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.
Under California Civil Code section 14, when is a signature by mark appropriate?
Whenever the signer is in a hurry
Whenever the signer prefers to use initials
When the signer physically cannot write their own name
When the signer has no acceptable identification
A signer who is blind and illiterate but fully alert wants to sign by mark. Is mental competence still required?
No, the two witnesses verify competence on the notary's behalf
Yes, the signer must still understand the document being signed
Only if the document concerns real property
Only when the notary personally suspects a problem
Sections you finish are checked off in the contents.