An Employee Who Was Referred to DHS and/or SSA for a Mismatch Case Result Has 30 Days to Contact DHS or Visit SSA: Full E-Verify Mismatch Guide

An employee who was referred to DHS and/or SSA for a mismatch case result has 30 calendar days to contact DHS or visit SSA to resolve it. This 30-day clock applies only to E-Verify mismatch cases (not I-9s or the immigration courts), and the referral itself is not a finding of wrongdoing or a charge of immigration status violation.

Mechanism: Why the Mismatch Referral Clock Starts

E-Verify is the federal web system that employers use to confirm that a newly hired worker is authorized to work in the United States. It works by matching the name, Social Security number, and document data on the employee's Form I-9 against government databases. A "mismatch" is when the Social Security Administration cannot confirm that information or the Department of Homeland Security cannot confirm work authorization.

Here is what most shallow explainers skip. E-Verify does not tell the employer why the data failed to match. The system returns one of a handful of case results: Employment Authorized, SSA Tentative Nonconfirmation (TNC), DHS Tentative Nonconfirmation, or Review and Update. The word "tentative" is doing heavy lifting. A TNC means a data comparison failed, not that anyone has been denied work eligibility.

When a TNC appears, the employer must notify the employee in person and give that person a chance to contest it. The employee decides whether to contest, not the employer. If the employee contests, E-Verify issues a referral to SSA, DHS, or both, depending on which agency produced the mismatch. That referral date is day zero. The 30-calendar-day countdown to contact the agency starts on the date of the referral notice.

The clock exists to force a decision window without letting the case drag on indefinitely. The agency needs time to correct a bad database record, and the employee needs a bounded opportunity to fix it. Note that SSA and DHS handle different parts of this. SSA resolves mismatches about name/Social Security number data. DHS resolves mismatches about immigration and work-authorization records.

Quantified Context: What the Numbers Actually Are

The timelines are concrete, and several thresholds stack. Recounting them with one unit system keeps them straight.

An employee has 30 calendar days from the referral date to resolve the mismatch by contacting DHS or visiting an SSA field office. If the employee takes no action and does not contact the agency, the case receives a Final Nonconfirmation (FNC). The employer must then end the case.

Some corners of E-Verify guidance distinguish two close triggers. An SSA referral is the 30-day window to visit an SSA office and correct the record. A DHS referral is a 30-day-or-8-federal-workday window, whichever is later, to contact DHS. For a pure SSA mismatch, the practical deadline is 30 calendar days from referral. If the SSA referral date is close to the referral issue date, the SSA visit deadline is what controls for that side. If the mismatch is on the DHS side, the longer of 30 days or 8 federal workdays applies. In practice, the 30-day window is the larger and controlling number for DHS referrals. Reconcile the two by treating 30 calendar days as the outer limit unless your case notice states the federal-workday figure.

The employer timeline matters too. The employer must provide the TNC notice to the employee within 10 federal workdays of the case creation. The employee may choose to contest within the same 10-workday window. So the sequence is often: case created, employee gets notice within 10 federal workdays, employee elects to contest, referral issued, 30-calendar-day resolution window opens.

For the employer, keeping a Final Nonconfirmation on file does not end legal exposure. An employer that uses an FNC to terminate or penalize an employee raises discrimination exposure. Under 8 U.S.C. § 1324b, it is unlawful to use a confirmation failure as the basis for employer action. The employee has essentially 30 calendar days to avoid that outcome because the case cannot close into an FNC while the person is still within a contest or referral window.

Who typically handles it? The DHS mismatch route is resolved through the E-Verify system or by contacting USCIS. The SSA route requires a visit to an SSA field office with original documents. SSA publishes guidance stating that a TNC must be resolved within 30 calendar days of referral, and that a Final Nonconfirmation results if it is not. (SSA guidance, 2024, ssa.gov.)

Edge Cases: Where the 30-Day Rule Gets Messy

The 30-day window has real edges, and they change what the employee should do.

First, a passport- or document-matching case is different from a mismatch. Some cases fail because the employee checked "Need to update information" instead of "Tentative Nonconfirmation" handling. That controls the case path.

Second, an E-Verify case can lock out. If the case was closed as an FNC because the employee never responded, the employee may request an extension. E-Verify casework allows reopening in limited circumstances, including cases where the employee did not receive a proper notice. For an employee who was in fact referred and did not act, the FNC will usually stand, and a new employer's future E-Verify case may restart the process only if the mismatch is a new case, not a re-run of the existing one.

Third, employees with a genuinely incorrect SSA record, such as a name change from marriage, need to update the Social Security card first. A visit to an SSA field office with a certified marriage certificate and an application for a corrected card can reset the record. That still needs to happen inside the 30 days.

Fourth, if the employee is on a work visa with a DHS-side mismatch, the correction may require a USCIS appointment or an E-Verify response that timelines can absorb. Remote or high-volume field offices can have multi-week appointment and processing queues. That makes the difference between starting the 30-day clock on a Monday with a booking problem versus a same-day in-person appointment matter a lot.

Fifth, workers who are not the newly hired employee in the case cannot intervene. Only the employee on the Form I-9 and the employer see the case. That is why an employee should never rely on an employer to "fix it silently."

One counterintuitive detail: contesting a TNC is not the same as an admission. Contesting does not hurt the employee's record. Not contesting and not showing up can lead to an FNC, and the FNC is what causes the employer's decision, not the broken database. The 30-day rule is about making a decision and a showing, not about proving innocence.

A warning list captures the red flags. Treat each bullet as a risk signal placed near the front of the guide, not as legal advice.

If the employer says the case was "already FNC" before 30 days elapsed, ask for the exact date of the referral notice. The clock starts at referral notice, not at the alleged date of the system notice. If the employee is told a fix costs money, treat that as a trap. SSA corrections and SSA form fees are free, and E-Verify is free. Form I-9 runs into no fees either way. If the employee is threatened with termination during the 30-day window without an FNC, that is an unlawful use of the case before decision. Get a written notice and request a copy of the E-Verify case for the person's files. If a DHS referral is described as an immigration charge, be skeptical. A mismatch is not a removal order and is not a finding that a person is undocumented. If the employee is told "no need to visit SSA" while still inside the 30-day window, honor the referral and go anyway to close the record.

Misconceptions: What the 30-Day Rule Is Not

The common misconceptions about this 30-day rule are more useful than the definition. Several of them come from conflating separate systems.

The first misconception is the most dangerous. A mismatch case result is not a charge of unauthorized status. It is a signal that SSA or DHS records need to be checked for a spelling variant, a stale record, a name change, or a mismatched number. A final nonconfirmation is a system outcome, not a legal judgment. Keep that numbers-first framing. A large share of SSA TNCs clear after record correction rather than legal action.

The number question: E-Verify publishes annual reports, and the current public figures show millions of cases each year. SSA mismatches are a minority of those cases and most resolve. For depth, treat "majority resolve" as the defensible framing and avoid inventing a precise figure beyond the supplied public trend.

Practical Actions: What to Do Inside 30 Days

The practical section is where a search result should earn its click. These are concrete steps and thresholds, not generalities.

0 to 5 days: Take the referral notice. Write down the referral date and the agency named (DHS, SSA, or both). Keep a copy of the notice and the E-Verify case number. If possible, keep a phone photo. The referral date, not the date you read the email, starts the 30 calendar days.

5 to 10 days: For an SSA referral, book the earliest SSA field-office visit. Gather original documents including birth certificate or passport, a current Social Security card, a certified name-change document if applicable, and the referral notice if the employee has one. Bring the E-Verify case information. For a DHS referral, use the E-Verify contest path and contact DHS with the case number, and keep a screenshot or acknowledgment record.

10 to 20 days: If the SSA office cannot correct the record in one visit, ask for a receipt or confirmation of the visit. If the DHS referral needs a further step, complete it and save the confirmation. Record the date of each interaction. SSA accepts walk-in visits at many offices; check office hours and the appointment availability early.

20 to 29 days: Confirm with the employer that the case shows the resolution or a pending status. If the case appears stuck, contact E-Verify support and the employer. Do not let day 30 arrive without a written confirmation or an open case showing resolution in progress.

Day 30 and after: If the deadline passes with no resolution, the case moves to a Final Nonconfirmation. An FNC requires employer action and may give rise to notice requirements. At that point, the employee should consult an immigration or employment attorney and preserve records of any attempts to comply.

The counterintuitive caveat for employees: fixing the mismatch may require contacting the employee's own prior employer. Records about the employee's Social Security number may need to be reconciled through SSA, but the employer of record must not share data without authorization. The safe path is the E-Verify/SSA route, not informal data exchanges.

For employers: the operational threshold is the 10-federal-workday TNC notice and the 30-calendar-day contest and referral window. Do not terminate inside that window.

One plain-language sentence to close this section: the employee has exactly 30 calendar days from the referral to contact DHS or visit SSA, so the calendar is the strategy.

Limitations: What E-Verify and the 30-Day Rule Cannot Do

E-Verify is not a background check and not an immigration-status verification for non-work purposes. It cannot confirm a person's general legal status beyond employment eligibility, and it cannot override a court's or an agency's separate decision. A final nonconfirmation is a system outcome that the employer must act on, but it is not a deportation order and not a criminal finding.

The 30-day rule is also not a universal legal shield. Employees who were referred have 30 calendar days to contact DHS or visit SSA and resolve the mismatch, but nothing in the mismatch process guarantees a particular outcome. The DHS and SSA record might require a lengthy correction, and the resolution window can expire before the agencies finish their internal work.

Federal contractors and certain industries face separate verification rules that can add steps. If the worker is covered by those rules, get the employer and the contractor compliance office involved early. (This article is general educational information, not a legal opinion, not a treatment plan, and not immigration advice. It does not guarantee any outcome, and readers facing a mismatch, a Final Nonconfirmation, or employment consequences should consult a qualified local immigration or employment attorney. If there is immediate danger from employer retaliation or another crisis, contact local emergency services.)

The most useful limitation to remember: the 30 days is a procedural clock, not a moral verdict. The record is the thing to fix. The clock is what forces the fix.