Signature Verification
Petition signature verification before the filing office does it
Match. Review. Know.
A raw signature count is not the number that matters. VFO reviews collected signatures against the standards a filing office applies, so the campaign knows its estimated valid count — and can still act on it.
Signature Verification
Know your valid count while there is time to fix it.
Signatures fail for predictable reasons: the signer is not registered, is registered outside the district, signed twice, or the sheet itself is incomplete or incorrectly certified. Discovering that at the filing office is too late.
VFO’s verification and validation work measures those failure points during and after collection, documents what it finds and gives the campaign an evidence-based estimate of where the petition stands.
What VFO does
What VFO manages, performs and documents.
Voter-file matching
Checking signers against available voter registration data to confirm registration and district, where that data is lawfully available to the campaign.
Duplicate detection
Identifying signers who appear more than once across the petition.
Sheet + circulator review
Reviewing each sheet for the completion, certification and circulator requirements that apply in the jurisdiction.
Validity estimates
Estimated valid signatures overall and by required geography, with the method and its limits stated plainly.
Ongoing quality feedback
Validation results fed back to the field during the drive, so problem collectors or locations are corrected.
Documentation
Organized review records that support filing decisions — and any later challenge or defense.
Line by line
Every line checked. Every exception documented.
Verification is precise, repetitive work. Each line is tested against the same checks, and anything that fails is logged with the reason, never quietly dropped or counted.
| Line | Registered | In area | Unique | Line complete | Sheet valid | Result |
|---|---|---|---|---|---|---|
| Line 01 | passes | passes | passes | passes | passes | Counted |
| Line 02 | passes | passes | fails | not needed | not needed | Exception: duplicate |
| Line 03 | passes | fails | not needed | not needed | not needed | Exception: out of area |
| Line 04 | passes | passes | passes | passes | passes | Counted |
- Registered
- Signer found as a registered voter in lawfully available data.
- In area
- Registration address inside the required jurisdiction or district.
- Unique
- Signer does not appear elsewhere on the petition.
- Line complete
- Required entries present and legible, such as name, address and date.
- Sheet valid
- Circulator certification and sheet requirements met where the jurisdiction requires them.
How it runs
From raw signatures to an evidence-based count
Each phase ends in a decision. The decisions are made with the client, using the data the phase produces.
01
Set the standard
Confirm the review standards that apply in the jurisdiction, with counsel where needed.
DecisionWhich review standards apply in this jurisdiction, and which checks counsel wants applied.
02
Intake + log
Petitions logged into custody and organized for review.
DecisionHow petitions are batched and prioritized: by geography, circulator or intake date.
03
Review
Voter-file matching, duplicate checks and sheet review.
DecisionHow to treat borderline lines (illegible, partial matches) consistently and document the rule.
04
Estimate + report
Estimated valid count, problem patterns and recommended actions.
DecisionWhether the estimated valid count supports filing, or more collection is needed, and where.
05
Document
Review records retained to support the filing and any review that follows.
DecisionWhat records to retain for the filing and any later challenge or defense.
What you receive
Deliverables and reporting.
What a signature verification engagement typically produces. The exact scope, formats and cadence are agreed in each engagement.
Validity estimate
Estimated valid signatures overall and by required geography, with the method and its limits stated plainly.
Exception report
Every failed line or sheet with the reason (unregistered, out of area, duplicate, incomplete, sheet defect).
Circulator + location quality
Validity by circulator and location, so the field can correct problems while collection continues.
Duplicate analysis
Signers appearing more than once, identified across the whole petition.
Review records
Organized, reproducible records supporting filing decisions and any later challenge or defense.
Know the difference
Verification is not certification.
Only the responsible election official determines whether a petition qualifies. VFO’s verification is the campaign’s own independent review — an estimate built from the same kinds of checks, done early enough to act on. It also differs from a petition challenge, which is a formal process initiated after filing.
- Verification + validation
- The campaign’s internal review of its own signatures before filing.
- Official review
- The election office’s determination of sufficiency — the decision that counts.
- Challenge or defense
- A formal, lawful process after filing, led by counsel.
The experience behind the work
- Years of combined QA + fraud-detection experience
- 25+
- Years of combined ballot-access experience
- 25+
- Ballot qualification recordHistorical · VFO-managed qualification programs
- 100%
Questions
Signature Verification: common questions.
What is petition signature verification?
Petition signature verification is the review of collected signatures to determine how many are likely to be accepted as valid — checking registration, district, duplicates and sheet requirements. Campaigns do it before filing so they can see their estimated valid count and collect more if needed.
What is the difference between verification and validation?
The terms are often used interchangeably. In VFO’s work, verification refers to checking individual signers and sheets, and validation refers to the overall measurement of how many signatures are likely valid. Either way, the purpose is an evidence-based count before filing.
Why do petition signatures get rejected?
Common reasons include signers who are not registered or are registered outside the required area, duplicate signatures, illegible or incomplete entries, and sheets that do not meet circulator or certification requirements. The specific grounds depend on the jurisdiction.
Does verification guarantee our petition qualifies?
No. Only the responsible election official decides sufficiency. Verification gives the campaign an informed estimate early enough to act on — which is exactly why it matters.
Can you review a petition another vendor collected?
Yes. VFO can independently review signatures collected by volunteers or another vendor, subject to access to the petitions and lawfully available data.
How accurate is a validity estimate?
An estimate is only as good as its method and data. VFO states both: which checks were applied, to how many lines and with what data, so the campaign can weigh the estimate accordingly. Only the election official’s review is final.
Do you review every line or a sample?
It depends on the engagement, the timeline and the decision the campaign needs to make. VFO can review every line or use sampling for an estimate, and it states which method was used.
Related services
Keep exploring
Full-Service Ballot Access
Qualify. Verify. Defend.
One accountable partner from petition planning through collection, validation, filing readiness and challenge support.
Petition Management
Plan. Run. File.
End-to-end petition drive management: planning, staffing, logistics, reporting, custody and filing readiness.
Petition Challenges
Review. Document. Support counsel.
Factual, documented petition review that supports counsel in lawful challenges to a petition’s qualification.
Start the scoping conversation
What we need to scope it.
Share what you have. Partial answers are fine. A VFO leader will respond with what’s realistic and what it will take.
- Jurisdiction and the review standards that apply
- Number of signatures or sheets to review, and how they will be accessed
- Lawfully available voter data the campaign can provide or authorize
- Timeline: during collection, before filing, or both
- Who collected the signatures (VFO, volunteers, another vendor)
- Counsel’s involvement and any specific checks counsel requires