I check whether employment ended before treating returning event staff as rehires. If it did, Supplement B is an option within 3 years of the original Form I-9’s completion date. After that, a new Form I-9 is required.
Here’s my quick comparison:
| What I check | Supplement B | New Form I-9 |
|---|---|---|
| When it applies | Eligible rehires within 3 years | Optional within 3 years; required after 3 years |
| Prior record | Requires a usable original I-9 | Used if the original is missing or cannot be matched |
| Documents | List A or List C documentation only if reverification is required | Employee chooses acceptable documents for full verification |
| Form version | Current Supplement B for an older I-9 | Current Form I-9 |
| Retention | Kept with the original I-9 | Kept as a separate record; earlier records remain subject to retention rules |
Another event does not automatically mean another hire. I review employment status, dates, work authorization, and record retention - not just the schedule. <u>Event staff scheduling tools can help track assignments, but they do not decide I-9 requirements.</u>
Supplement B or New I-9? Event Staff Rehire Decision Guide
Start by checking whether the worker was terminated, resigned, left payroll, or otherwise separated from employment. Review whether both sides reasonably expected the worker to return. Look at termination notices, payroll records, agreements, on-call policies, assignment records, and return-to-work communications. USCIS focuses on continuity and a reasonable expectation of return - not just the length of the gap.
For staffing agencies, assess the worker’s relationship with the agency - not whether a client placement ended. Completing one placement does not necessarily end agency employment if the worker remains employed and available for other assignments. This check determines whether the worker is returning under continued employment or as a rehire.
If employment continued, a new event alone does not make the worker a rehire. Check work authorization separately. Supplement B may be needed to reverify work authorization, but not List B identity documents.
If employment ended, follow the rehire rules rather than automatically completing a new Form I-9. Document the status decision and the facts behind it. For a true rehire, use the 3-year rule in the next section to choose between Supplement B and a new Form I-9.
For returning event staff, first confirm that the worker is a true rehire using scalable event scheduling protocols. Then check the original Form I-9 completion date to decide whether to use Supplement B or a new Form I-9.
Supplement B lets you update a returning worker’s original file instead of starting over. Confirm that the prior Form I-9 belongs to the employee and that the rehire falls within 3 years of its original completion date. A later Supplement B entry does not restart the clock.
Enter the rehire date, any name changes, and the employer certification on Supplement B, often managed through budget-friendly staff scheduling tools. Keep it with the original Form I-9. If the prior form is an older version, use the current Supplement B.
Reverify only when required. If the employee’s prior employment authorization has expired and reverification is required, they must present acceptable List A or List C documentation. Record those document details in Supplement B. Expired documents alone do not trigger reverification. U.S. citizens, noncitizen nationals, and lawful permanent residents who presented Form I-551 generally do not need reverification.
If the prior form cannot support a Supplement B update, complete a new Form I-9.
You may use a new Form I-9 within 3 years of the original form’s completion date, and you must use a new one after 3 years. Use a new form sooner if the prior record is missing or cannot be matched to the employee.
Use the current Form I-9 and let the employee choose which acceptable documents to present. The employee must complete and sign Section 1 by the first day of employment. The employer must complete Section 2 within 3 business days after that day - or on the first day if the job lasts fewer than 3 business days.
Once you confirm a true rehire and check the 3-year window, use this table to see which form applies.
| Requirement | Supplement B | New Form I-9 |
|---|---|---|
| Availability | Available within 3 years, but only if the original Form I-9 is usable. | May be used within 3 years; required after 3 years. |
| Prior record | Requires an identifiable original Form I-9. It does not fix errors in that form. | Creates a new, standalone record. It does not fix problems in earlier records. |
| Work authorization | Records the rehire. Add employee-chosen List A or List C documentation only when reverification is required. | Requires full I-9 completion, with the employee choosing acceptable documents. |
| Form version | Use the current Supplement B when attaching it to an older Form I-9. | Use the current Form I-9 version. |
| Recordkeeping | Keep Supplement B with the original Form I-9. Retain forms for 3 years after hire or 1 year after employment ends, whichever is later. | Keep the new form and retain earlier records for the required period. |
| Main advantage | Avoids repeating full verification for an eligible rehire. | Provides a complete, standalone verification record. |
| Main limitation | Requires usable records and accurate reviews of dates and work authorization. | Requires full completion even when Supplement B would have been allowed. |
Follow the same review sequence each time: employment status, original form date, work authorization, then retention. Before choosing Supplement B or a new Form I-9, confirm whether the worker’s prior employment actually ended.
Check the original Form I-9 completion date to determine whether the rehire falls within 3 years.
Review the employee’s current work authorization and whether reverification is required. If it is, request an unexpired List A or List C document. Let employees choose which acceptable documents to present, and do not reverify List B identity documents.
Keep the Form I-9, Supplement B pages, and attachments for the required retention period, and track the deadline. Check the USCIS Form I-9 page and Handbook for Employers M-274 for current instructions and rehire guidance.
Scheduling tools help manage staffing, but they do not replace compliance review. Quickstaff can track schedules and availability. Those records, however, do not prove continuous employment or determine rehire status.
Keep the original entries readable. Employees correct Section 1. You or an authorized representative correct Section 2 and Supplement B. For paper forms, draw a single line through each error, enter the correction, then initial and date it. Never use whiteout, erase entries, or backdate corrections.
For multiple or major errors, you may attach a corrected section or a new form to the original. Include a memorandum explaining the changes, when you discovered the errors, and the correction details.
Keep a centralized log that tracks event assignments separately from formal employment status. Record each worker’s hire, separation, and rehire dates in MM/DD/YYYY format.
Returning for another event doesn’t automatically count as a rehire. These records help you determine whether an existing Form I-9 remains valid.
Quickstaff can help keep assignment histories and scheduling patterns in one place to support your documentation.
Yes. You can use Supplement B for multiple rehires of the same employee, as long as each rehire occurs within three years of the date the original Form I-9 was completed.
During that three-year window, you can use Supplement B or complete a new Form I-9. After three years, a new Form I-9 is required. Returning for another event doesn’t always count as a rehire.
