How to Fill Out Illinois IDFPR Professional Engineer License + FAQs

The Illinois IDFPR Professional Engineer License Application is the form licensed engineers file with the Illinois Department of Financial and Professional Regulation (IDFPR) to earn or maintain the legal right to practice engineering in Illinois under the Professional Engineering Practice Act of 1989 (225 ILCS 325/). The form is filed by recent exam passers, out-of-state PEs seeking comity, and lapsed licensees seeking restoration, and a missed line, signature, or fee can stall a file for months.

IDFPR processes more than 2,000 PE applications a year, and the agency reports that nearly 30% of paper packets are returned for missing experience verifications, missing notarizations, or unsigned affidavits, according to its published licensee statistics. Those returned files often add 60–120 days to the wait, which is enough to push a project, a job offer, or a stamped drawing past its deadline.

Here is what this guide gives you:

📜 The exact line-by-line walkthrough for Examination, Endorsement, and Restoration tracks
🧾 The full pre-filing checklist of documents, IDs, and fees
🖊️ Three named-person scenarios that mirror the most common filer profiles
🚫 The 10 most common mistakes that trigger an IDFPR rejection letter
❓ Twelve plain-English FAQs that answer field-level confusion

What the Form Is and Who Must File It

The Illinois PE application is the official packet the IDFPR Division of Professional Regulation uses to verify that an engineer meets the education, experience, examination, and character standards in 225 ILCS 325/ and the implementing rules at 68 Ill. Adm. Code 1380. The agency that receives it is IDFPR, the statute that requires it is the Professional Engineering Practice Act of 1989, and the board that reviews close calls is the Board of Professional Engineers.

Three groups of filers use the form. The first is the examination filer, an Engineer Intern (EI) who has passed the NCEES Principles and Practice of Engineering (PE) exam and now wants the actual license. The second is the endorsement filer, a PE already licensed in another U.S. state who wants Illinois comity through the NCEES Records program. The third is the restoration filer, a former Illinois PE whose license lapsed and who now wants it active again under the rules in 68 Ill. Adm. Code 1380.110.

Anyone who plans to offer engineering services in Illinois, sign and seal drawings for an Illinois project, or call themselves a Professional Engineer in Illinois must hold a current PE license. Practicing without it is a Class A misdemeanor on the first offense and a Class 4 felony on later offenses under 225 ILCS 325/40. The renewal cycle is biennial, and every active license expires on November 30 of each even-numbered year, per the IDFPR renewal page.

The current paper application is the Application for Licensure as a Professional Engineer, revision date printed in the lower-left footer of page 1. Always confirm you have the latest revision before mailing, because IDFPR routinely refuses outdated form versions.

Before You Start: Documents and Information You Need

Open the form only after you have every item below in front of you. Stopping mid-application to chase a transcript is the single biggest cause of typos, mismatched dates, and unsigned blocks.

Government-issued photo ID with your full legal name as it appears on your Social Security card, because IDFPR cross-checks names against the SSA database and a mismatch triggers a hold.
Social Security Number, required by 5 ILCS 100/10-65 and used for child-support and tax-compliance checks; without it, IDFPR cannot issue a license.
NCEES Record number or, if you do not have one, official transcripts from every engineering program you attended, sent directly from the registrar to IDFPR.
PE exam score transmittal sent from NCEES to IDFPR through the NCEES exam-score transmittal service.
Verification of Engineering Experience forms, one per qualifying employer, signed by a licensed PE who supervised your work.
Three professional references, at least one of whom must be a licensed PE, each ready to mail a sealed reference form directly to IDFPR.
License verifications from every state where you currently or previously held a PE license, sent directly from those state boards.
Court documents for any “yes” answer on the disciplinary, criminal, or malpractice disclosure questions, because unexplained “yes” answers go to the Board for review.
Application fee payment, currently $400 for examination and endorsement and a higher restoration fee that depends on how long the license has been inactive, per the IDFPR fee schedule at 68 Ill. Adm. Code 1380.APPENDIX A.
Notary access, because the affidavit on the last page must be signed in front of a notary public.

Each missing item adds days. Missing two items at once usually means a returned packet.

Where to Get the Form and How to Access It

The official form lives on the IDFPR Professional Engineer page, under the Applications heading. Download the PDF that matches your track: PE by Examination, PE by Endorsement, or PE Restoration. Each track has its own packet, and using the wrong one is an automatic return.

You can also file most steps through the IDFPR Online Services Portal, which lets you start the application, pay the fee, and upload supporting PDFs. The portal does not replace the mailed originals for the Verification of Engineering Experience, the References, or the Affidavit, all of which IDFPR still requires on paper with wet signatures.

If you cannot download the PDF, you may request a paper packet by calling IDFPR at 1-800-560-6420 or writing to IDFPR, 320 West Washington Street, 3rd Floor, Springfield, IL 62786. Mailed packets take 7–14 days to arrive, so plan ahead if your renewal or job start date is close.

Always check the revision date in the form’s footer before filling it in. IDFPR updates the form every few years, and an outdated version is the fastest way to get a rejection letter that simply reads “Please use current form.”

Step-by-Step: How to Fill Out the Illinois PE Application Line by Line

The walkthrough below tracks the paper packet field by field. Online filers see the same fields in the same order in the IDFPR Online Services Portal. Use blue or black ink only, print in capital letters, and never use correction fluid.

Section 1, Box 1: Track Selection (Examination, Endorsement, or Restoration)

This box asks which licensure path you are using. Check exactly one box, because checking two voids the application.

To answer it, read the three checkboxes carefully and mark the one that matches your situation. Maya Patel, a Chicago EIT who just passed the PE exam, checks Examination. David Romero, a Texas-licensed PE moving to Naperville, checks Endorsement. Linda Walsh, whose Illinois PE license lapsed in 2019, checks Restoration.

A nuance many filers miss: a former Illinois PE who has been lapsed for less than 5 years files Restoration, but a former Illinois PE lapsed more than 5 years must also pass a Board interview under 68 Ill. Adm. Code 1380.110. The most common mistake here is an out-of-state PE checking Examination because they took the exam years ago; IDFPR returns the packet because endorsement is the correct path. A common misconception is that “endorsement” means automatic reciprocity, but Illinois reviews each endorsement file on its own merits.

Section 1, Box 2: Full Legal Name

This box asks for your full legal name as it appears on your Social Security card.

Print last name, first name, and middle name in the order shown, with one letter per box if the form uses a grid. Maya writes PATEL, MAYA SUNITA. Do not use nicknames, initials only, or married/maiden combinations unless that is exactly what your SSA card shows.

The nuance is that recently married or divorced filers must use the name that matches their current SSA card, not the name on their diploma. The mistake to avoid is mixing maiden and married names across the application; IDFPR’s name-match check will fail and the file will go on hold. The misconception is that you can write your “professional” name here — you cannot. The legal name is the only acceptable entry.

Section 1, Box 3: Other Names Used

This box captures any prior legal names you have used, including maiden names and prior married names.

List each former name on its own line with the dates it was used. Linda writes WALSH (current, 2007–present) and MURPHY (1985–2007). If you have never legally changed your name, write NONE — never leave it blank.

The edge case appears for filers who changed names through court order rather than marriage; attach a copy of the order. The mistake is leaving the box blank when you have a former name, because IDFPR will find the prior name in the NCEES record and flag the inconsistency. The misconception is that minor spelling variations do not count; they do, and they should be listed.

Section 1, Box 4: Date of Birth

This box asks for your date of birth in MM/DD/YYYY format.

Write the month, day, and year using two digits for the month and day and four digits for the year. David writes 07/22/1984. Do not use slashes if the form already prints them; just fill in the digits.

A common nuance: filers born outside the U.S. sometimes write the day before the month out of habit, which inverts the date. The mistake of writing 22/07/1984 makes IDFPR question your identity records. The misconception is that the date must match your passport; it must match your SSA records, which is what IDFPR cross-checks.

Section 1, Box 5: Social Security Number

This box collects your nine-digit SSN.

Write the SSN exactly as printed on your Social Security card, including the dashes if the form shows them. Maya writes 123-45-6789. Never substitute an ITIN or a tax ID number; only the SSN is acceptable under 20 ILCS 2105/2105-15.

The nuance: applicants without an SSN must apply for one before filing, because IDFPR cannot issue a license without it. The mistake is leaving it blank in the belief that SSN is “optional” — it is not. The misconception that the agency will accept a passport number instead is wrong and causes immediate return.

Section 1, Box 6: Mailing Address

This box collects the address where IDFPR will mail your wall license and renewal notices.

Write the street address, apartment number, city, state, and ZIP code. David writes 412 RIVER OAK DR, NAPERVILLE, IL 60540. P.O. boxes are accepted as the mailing address only if you also list a physical address in Box 7.

The edge case is military APO/FPO addresses, which are accepted with the standard APO formatting. The mistake is moving during processing and not updating your address through the Online Services Portal; your license can be mailed to the old address and lost. The misconception is that an out-of-state mailing address disqualifies you — it does not.

Section 1, Box 7: Physical/Practice Address

This box asks where you actually live or practice, separate from the mailing address.

Enter the street address only; no P.O. boxes. Linda writes 88 LAKESHORE LN, EVANSTON, IL 60201. If your mailing and physical addresses are the same, write SAME AS BOX 6.

The nuance is that IDFPR uses the physical address for jurisdictional verification of in-state experience for restoration files. The mistake of leaving this blank when Box 6 is a P.O. box triggers a return letter. The misconception is that this address becomes public — it does not, only the city and state appear on the public license-lookup tool.

Section 1, Box 8: Phone and Email

This box collects a daytime phone number and a current email address.

Use one phone and one email; IDFPR sends most updates by email. Maya writes (312) 555-0148 and maya.patel@email.com. Use an email you check daily, because exam-score and Board correspondence often come this way.

The edge case is filers who share an email with a spouse; create a personal one before applying. The mistake is using a work email that may be cut off if you change jobs mid-application. The misconception is that IDFPR will call you about issues; in practice, almost everything happens by email or letter.

Section 2, Box 9: Education History

This box asks for every post-secondary institution you attended in engineering or a related field.

List each school, the degree earned, the major, and the graduation date. David writes TEXAS A&M UNIVERSITY, B.S. CIVIL ENGINEERING, 05/2007. Attach official transcripts sent directly from each registrar to IDFPR, or use the NCEES Record to transmit them.

The nuance is that an ABET-accredited engineering degree streamlines review under 68 Ill. Adm. Code 1380.50, while a non-ABET degree triggers a credentials evaluation by NCEES. The mistake of listing a school but failing to send the transcript is the single most common cause of return. The misconception is that a master’s degree alone counts; in Illinois, the bachelor’s-level engineering credential is the anchor.

Section 2, Box 10: Engineering Experience

This box documents every qualifying engineering position you have held.

List each employer, your title, your direct supervisor (preferably a PE), the dates of employment, and a short description of duties. Maya writes ACME STRUCTURAL, EI, JOHN LEE PE, 06/2021–PRESENT, BRIDGE DESIGN. Use a continuation sheet if you need more lines.

The nuance is that examination filers need four years of qualifying experience after the bachelor’s degree under 225 ILCS 325/13, with a master’s degree counting up to one year. The mistake is overstating duties to look more senior; supervisors who sign Verification of Experience forms can flag the inflation. The misconception is that any engineering job counts — it does not. Routine drafting or sales engineering rarely qualifies.

Section 3: Verification of Engineering Experience (Form B)

Form B is a separate one-page exhibit signed by a licensed PE who supervised your engineering work.

Give one Form B to each qualifying supervisor and ask them to mail it directly to IDFPR. David’s supervisor in Texas, Engineer Sarah Kim PE, fills in dates, percentage of time on engineering tasks, and her own license number, then mails it sealed.

The nuance is that an unsigned, photocopied, or applicant-mailed Form B is rejected; IDFPR requires a wet signature mailed by the supervisor. The mistake is asking a non-PE manager to sign — only a licensed PE qualifies. The misconception is that LinkedIn endorsements or letters of recommendation can replace Form B; they cannot.

Section 4: References (Form C)

Form C is the professional reference form, completed by three people who know your engineering work.

At least one reference must be a licensed PE in any U.S. state. Linda asks two PEs and one project manager to mail Form C directly to IDFPR. References cannot be relatives or current direct reports.

The nuance is that references should be people who have observed your work in the past five years, because older references carry less weight. The mistake of bundling references into your own packet voids them; each must arrive in its own sealed envelope from the reference. The misconception is that more than three references helps — IDFPR uses only three.

Section 5: PE Examination Information

This section asks for the date and location where you passed the NCEES PE exam.

Enter the exam discipline (Civil, Mechanical, etc.), the exam date, and the state where you sat. Maya writes CIVIL — STRUCTURAL, 04/19/2025, ILLINOIS. Then go to the NCEES exam-score transmittal page and order your score sent to IDFPR.

The nuance is that legacy paper-and-pencil exams from before 2020 may need a Board memo to confirm equivalence. The mistake is self-reporting a score without ordering the NCEES transmittal; IDFPR will not accept a self-reported score. The misconception is that passing the FE alone qualifies — it does not. The PE exam is what unlocks the license.

Section 6: Other State Licenses

This section lists every PE license you currently hold or have held in any state.

For each state, write the license number, status, and date of original issue. David writes TEXAS PE 112233, ACTIVE, 09/2012. Order a verification of licensure from each state board to be mailed directly to IDFPR.

The nuance is that endorsement filers must show continuous active licensure in another state for the comity provisions in 68 Ill. Adm. Code 1380.50 to apply cleanly. The mistake of forgetting an old, lapsed out-of-state license raises a candor issue if IDFPR finds it through NCEES. The misconception is that NCEES alone proves licensure status; the state board verification is still required.

Section 7: Disciplinary, Criminal, and Malpractice Disclosure

This section poses several yes/no questions about discipline, crimes, and malpractice claims.

Answer every question; never leave one blank. Linda, who has no history, checks NO on each. Any YES requires a typed explanation and certified court or board documents.

The nuance is that even an old, expunged matter must be disclosed in many cases under 20 ILCS 2105/2105-205. The mistake of hiding a YES answer is grounds for license denial and later revocation under 225 ILCS 325/22. The misconception that a sealed record is invisible to IDFPR is wrong — IDFPR runs background checks.

Section 8: Affidavit and Notarization

The last page is a sworn affidavit that your answers are true and complete.

Sign and date the affidavit in front of a notary public, who then completes the notary block. Maya signs MAYA S. PATEL, dates 05/15/2026, and the notary stamps and signs.

The nuance is that out-of-state notaries are accepted, but the notary block must include the commission expiration date. The mistake of signing the affidavit before reaching the notary’s desk voids the notarization; sign in their presence. The misconception that a digital signature is acceptable on the paper packet is wrong; only wet ink works.

Section 9: Fee Payment

The fee block asks for payment of the application fee.

For paper filers, attach a check or money order payable to IDFPR. For online filers, pay by credit card in the IDFPR Online Services Portal. David mails a check for $400 with his endorsement packet.

The nuance is that fees are non-refundable, even if your application is denied. The mistake of writing the wrong payee name causes the check to be returned. The misconception is that the fee covers the NCEES Record cost; it does not — NCEES charges separately.

Three Filled-Out Examples Using Real Scenarios

Each scenario below follows one named filer through the major sections of the Illinois PE application.

Scenario 1: Maya Patel, Examination Filer

Form Section	What Maya Enters
Box 1 — Track	Examination
Box 2 — Legal Name	PATEL, MAYA SUNITA
Box 4 — Date of Birth	11/02/1997
Box 6 — Mailing Address	224 N MICHIGAN AVE, CHICAGO, IL 60601
Box 9 — Education	UNIV. OF ILLINOIS URBANA-CHAMPAIGN, B.S. CIVIL ENG, 05/2020
Box 10 — Experience	ACME STRUCTURAL, EI, 06/2021–PRESENT
Section 5 — PE Exam	CIVIL—STRUCTURAL, 04/19/2025, ILLINOIS
Section 7 — Disclosure	All NO
Section 8 — Affidavit	Signed and notarized 05/15/2026
Section 9 — Fee	$400 check to IDFPR

Scenario 2: David Romero, Endorsement Filer

Form Section	What David Enters
Box 1 — Track	Endorsement
Box 2 — Legal Name	ROMERO, DAVID ANTONIO
Box 4 — Date of Birth	07/22/1984
Box 6 — Mailing Address	412 RIVER OAK DR, NAPERVILLE, IL 60540
Box 9 — Education	TEXAS A&M, B.S. CIVIL ENG, 05/2007
Box 10 — Experience	LONE STAR ENG, PE, 06/2012–PRESENT
Section 5 — PE Exam	CIVIL, 10/2012, TEXAS (transmitted via NCEES Record)
Section 6 — Other Licenses	TEXAS PE 112233, ACTIVE, 09/2012
Section 7 — Disclosure	All NO
Section 9 — Fee	$400 credit card via portal

Scenario 3: Linda Walsh, Restoration Filer

Form Section	What Linda Enters
Box 1 — Track	Restoration
Box 2 — Legal Name	WALSH, LINDA MARIE
Box 3 — Other Names	MURPHY (1985–2007)
Box 6 — Mailing Address	88 LAKESHORE LN, EVANSTON, IL 60201
Box 9 — Education	NORTHWESTERN, B.S. MECHANICAL ENG, 05/1985
Section 5 — PE Exam	MECHANICAL, 10/1990, ILLINOIS
Section 6 — Prior IL License	IL PE 062-045678, LAPSED 11/30/2019
Section 7 — Disclosure	All NO
Section 8 — Affidavit	Signed and notarized 05/20/2026
Section 9 — Fee	Restoration fee per Appendix A

How to File the Completed Form

You can file by online portal, mail, or in-person drop-off, and each channel has its own rules. IDFPR no longer accepts faxed applications for the PE license.

The online channel is the IDFPR Online Services Portal. The fee is $400 for examination and endorsement, paid by Visa, Mastercard, Discover, or American Express. Processing time is 8–12 weeks from the date all paper exhibits arrive. Save the portal confirmation page as your proof of filing.

The mail channel uses the address IDFPR, P.O. Box 7007, Springfield, IL 62791. Pay by personal check, cashier’s check, or money order made out to IDFPR. Processing time is 10–16 weeks. Use certified mail with return receipt for proof of filing.

In-person drop-off is allowed at 320 West Washington Street, 3rd Floor, Springfield, IL 62786 during business hours. Payment is the same as the mail channel. The clerk will date-stamp a copy of your cover sheet, which is your proof of filing.

For every channel, supporting documents from third parties — Form B (experience), Form C (references), transcripts, NCEES transmittals, and out-of-state license verifications — must arrive directly from the source, not from you. Track each one and follow up after 30 days.

What Happens After You File

Once IDFPR receives your packet, an intake clerk logs it and assigns a file number, which you can track in the Online Services Portal. The clerk reviews for completeness first; missing items trigger a deficiency letter mailed to the address in Box 6.

If the file is complete, it moves to the analyst stage for substantive review of education, experience, and exam scores. Most clean files clear analyst review in 6–10 weeks. Files with disclosure issues, non-ABET degrees, or unusual experience patterns go to the Board of Professional Engineers at its next monthly meeting, which can add 30–60 days.

Approval results in a license number and an emailed authorization to print a wall certificate. Denial results in a letter explaining the basis and your appeal rights under 20 ILCS 2105/2105-115. You can request an informal conference with the Board before a formal hearing.

Expect renewal notices to begin arriving from IDFPR roughly 90 days before the November 30 even-year deadline. Keep your address current in the portal so notices reach you.

Mistakes to Avoid When Filling Out the Form

Each error below has tripped up real filers and has a direct, documented consequence.

Using an outdated form revision — IDFPR returns the entire packet with a “use current form” letter.
Mixing maiden and married names between sections — the SSA name-match fails and the file goes on hold.
Leaving Section 3 (Other Names) blank when a former name exists — NCEES discloses it and IDFPR flags inconsistency.
Asking a non-PE supervisor to sign Form B — the experience block is voided and must be redone.
Mailing Form B or Form C inside your own packet — references and verifications must arrive directly from the source.
Self-reporting a PE exam score instead of using the NCEES transmittal — IDFPR refuses self-reported scores.
Listing an engineering position that was really sales or drafting — the analyst can disallow non-qualifying time.
Answering NO on a disclosure question that should be YES — denial now and revocation later.
Forgetting the notary block on the affidavit — the affidavit is invalid and the file is returned.
Sending the wrong fee amount or wrong payee — the check is returned and the file sits until corrected.

Do’s and Don’ts

A few habits make the difference between a smooth file and a six-month delay.

Do download the form fresh from the IDFPR PE page the same week you file, because revisions appear without notice.
Do order your NCEES Record early; it bundles education, exams, and references and saves weeks.
Do print in capital letters in blue or black ink, because IDFPR scans the form and faint pencil entries fail OCR.
Do photocopy the entire signed packet before mailing, so you have a reference if IDFPR asks questions.
Do track each third-party document weekly, because supervisors and registrars often forget to mail.
Do sign the affidavit in front of the notary, because pre-signing voids the notarization.
Don’t staple the application; IDFPR scanners reject stapled pages.
Don’t use correction fluid; cross out a single error and initial the change.
Don’t skip the Other Names box even if you think it is irrelevant.
Don’t mail cash, ever, under any circumstance.
Don’t call the Board for status updates in the first 30 days; it slows the queue.
Don’t assume endorsement is automatic; Illinois reviews each file on its merits.

Pros and Cons of Filing on Your Own vs. With Help

Most engineers file on their own, but some hire a licensing consultant or an attorney for tough files.

Pros of filing on your own:

Saves the $300–$1,500 a consultant charges.
Builds your own working knowledge of 225 ILCS 325/ for future renewals.
Lets you control the timeline; no third-party scheduling.
Keeps sensitive disclosure details inside your own household.
Works fine for clean exam, endorsement, and short-lapse restoration files.

Cons of filing on your own:

Takes 8–20 hours of focused work, often after business hours.
Easy to misread Section 7 disclosure questions and answer wrong.
No advocate at the Board if your file is flagged.
Re-filing after a return doubles your total time invested.
Tracking third-party Form B and Form C arrivals is tedious.

Pros of hiring help:

A licensing attorney can prepare disclosure responses that satisfy the Board the first time.
A consultant tracks third-party documents on your behalf.
Many consultants guarantee a complete first submission.
Useful for non-ABET degrees, unusual experience patterns, or 5+ year lapses.
Can speed approval by 30–60 days on complex files.

Cons of hiring help:

Adds $300–$1,500 in consultant fees or more for an attorney.
You still must sign and notarize the affidavit personally.
Quality varies widely; vetting takes time.
A consultant cannot sign Form B for you; only your real PE supervisors can.
Some firms upsell renewal services you do not need.

Filing Channel Comparison

A quick comparison of the three legitimate filing channels helps you choose.

Filing Channel	Key Details
Online Portal	Fastest intake; pay by card; processing 8–12 weeks
Mail (P.O. Box 7007)	Most common; pay by check; processing 10–16 weeks
In-Person (320 W Washington)	Same-day date stamp; same fees; same review queue

FAQs

Do I need to be an Illinois resident to apply?

No. Illinois licenses non-residents the same as residents under 225 ILCS 325/; only the practice and signing of work in Illinois trigger the licensure requirement.

Can I file the entire application online?

No. Many sections file online through the Online Services Portal, but Form B, Form C, transcripts, and the notarized affidavit must still arrive on paper.

Do I write my maiden name in Box 2 or Box 3?

No to Box 2 if your current SSA card shows your married name; Box 2 holds the current legal name and Box 3 holds prior names like a maiden name.

Should I list a job where I was titled “Engineer” but mostly did drafting?

Yes, list it in Box 10, but expect the analyst to discount non-engineering hours under 68 Ill. Adm. Code 1380; misrepresenting duties is far worse than a partial credit.

Can I use my master’s degree to shorten the experience requirement?

Yes. A master’s in engineering counts for up to one year of the four-year experience requirement under 68 Ill. Adm. Code 1380.50.

Do I have to disclose an arrest that did not lead to a conviction?

Yes if the form’s plain text asks about arrests; read each Section 7 question carefully because some ask about charges and others ask only about convictions.

Can my spouse sign Form C as a reference?

No. Relatives and household members are not accepted; references must be professional contacts who have observed your engineering work.

Is the application fee refundable if I am denied?

No. The IDFPR fee rule makes application fees non-refundable, even after denial.

Do I need to take the Illinois Structural Engineering exam separately?

Yes if you want the Structural Engineer (SE) license, which is a separate Illinois credential under 225 ILCS 340/; the PE license alone does not authorize SE practice.

Can I begin practicing as a PE the day my license number issues?

Yes, you can practice the moment the license shows Active in the IDFPR license lookup; do not stamp drawings before that date.

Should I leave Box 5 blank if I am uncomfortable sharing my SSN?

No. The SSN is mandatory under 20 ILCS 2105/2105-15; a blank Box 5 means the application cannot be processed.

Do I have to renew even if I never stamp a drawing in Illinois?

Yes to keep the license active; the biennial November 30 even-year renewal applies regardless of practice volume, and missing it begins the lapse-and-restoration cycle.

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