To fill out SF-86C, work through four short blocks: identify yourself in Block 1, mark “Yes” or “No” next to each SF-86 question category in Block 2 to show what has changed since your last questionnaire, explain every “Yes” in Block 3 with dates and details, and sign and date Block 4 in ink.1U.S. Office of Personnel Management. Standard Form 86C The form takes about 15 minutes if nothing has changed and longer if you have updates to describe. One thing to know before you begin: the General Services Administration now lists the SF-86C’s revision date as “Obsolete,” and continuous vetting under Trusted Workforce 2.0 is replacing many of the older procedures that used this form.2General Services Administration. Standard Form 86 Certification If your security office has still handed you an SF-86C, use it the way the instructions on the form describe.
Before You Start
Get a copy of your most recent SF-86. The SF-86C is a certification that either nothing has changed since that questionnaire or that specific things have. You cannot mark it accurately without seeing what the government already has on file, and the form itself instructs you to reference your most recent SF-86 or last background investigation.
Type your answers if you can. If you print in ink, print clearly. The form’s instructions warn that “if this form is not legible, it will not be accepted.”1U.S. Office of Personnel Management. Standard Form 86C Any correction made after you sign must be initialed and dated.
Block 1: Identification
Enter your full current legal name (last, first, middle, and maiden if applicable), Social Security number, date of birth, place of birth including city, state, and country, work and home telephone numbers, and email address. Use the name that appears in government records today. If your name has changed since your last SF-86, put the current legal name here, then plan to mark “Yes” next to the name question in Block 2 and explain the change in Block 3. Check the Social Security number twice; transposed digits are a common reason forms come back.
Block 1 also contains a checkbox you can mark if you want to speak with a government security officer before you complete Blocks 2 and 3. Use it if you are unsure whether something is reportable.
Block 2: Mark Each Category “Yes” or “No”
Block 2 lists the SF-86 question categories: name, citizenship, residences, schools, employment, military history, marital status, relatives, foreign contacts, foreign activities, mental health, police record, drug use, alcohol use, financial record, information systems, court actions, and association record. Go through each one and mark “Yes” if anything has changed since your last SF-86 or “No” if it has not.
The rule printed on the form is simple: do not repeat information you already reported on your most recent SF-86. You are only flagging what is new or different. If every category is “No,” you sign Block 4 and you are finished. In practice, at least one category almost always changes between investigations, so work through the list carefully rather than defaulting to “No.”
Block 3: Explain Every “Yes”
Every “Yes” answer in Block 2 needs a written explanation in Block 3. Reference the specific SF-86 question number so the investigator can line your update up with the right section of your existing file. Give concrete facts: names, dates, addresses, dollar amounts, jurisdictions, outcomes. Vague answers generate follow-up interviews and delay adjudication.
If you run out of space, attach additional pages. Put your name and Social Security number at the top of every attached page, and label each entry with the SF-86 question number it belongs to.1U.S. Office of Personnel Management. Standard Form 86C A checkbox in Block 3 lets you indicate that attachments are included.
Block 4: Sign and Date
Sign and date in ink. Your signature certifies that everything you reported is true. A knowing and willful false statement on the form can be prosecuted under 18 U.S.C. ยง 1001, which carries fines and up to five years of imprisonment.3Office of the Law Revision Counsel. 18 USC 1001 Statements or Entries Generally Beyond criminal exposure, falsifying or withholding information can lead to denial or revocation of your clearance and removal from federal service.
What Counts as a Reportable Change
The SF-86C mirrors the full SF-86’s scope. These are the categories where changes come up most often and the details investigators expect to see.
Residences, Employment, and Education
Report every new address, employer, and school since your last SF-86. The SF-86 requires a continuous ten-year employment history with no gaps, so any period of unemployment has to be listed with the reason and exact start and end dates.4Defense Counterintelligence and Security Agency. Common SF-86 Errors and Mistakes Do not stretch dates to cover a gap. Investigators verify dates directly with employers, and mismatches read as concealment. Include contact information for new supervisors and human resources offices.
Relationships and Family
Marriages, divorces, legal separations, and new cohabitants all require reporting. Give the other person’s full name, the date, and the location. Changes to your relatives’ citizenship or contact information go under the Relatives category (Question 18).
Foreign Contacts and Travel
New or continuing relationships with foreign nationals are reportable under Question 19, and foreign travel under Question 20. Include countries visited, dates, and the purpose of each trip. Ongoing contact with someone abroad, including through social media, is a contact. Under-reporting here is one of the most common deficiencies investigators flag.
Financial Issues
Question 26 covers bankruptcy filings within the past seven years, tax filing failures, delinquent federal debts, collection accounts, loan defaults, repossessions, foreclosures, wage garnishments, and evictions for non-payment.5U.S. Office of Personnel Management. Standard Form 86 Questionnaire for National Security Positions The questions ask whether the event occurred at all; there is no single dollar threshold. Report each issue in Block 3 with the creditor name, the amount, and the current status.
Legal Encounters
Arrests, charges, convictions, and civil court actions since your last investigation go under Questions 22 and 28. Include the jurisdiction, the approximate date, the nature of the offense or case, and the outcome. Arrests that did not lead to charges, and cases that were dismissed or expunged, still need to be disclosed.
Drug and Alcohol Use
Any illegal drug use is reportable, and that includes marijuana, regardless of state legalization. Security clearance adjudication follows federal law, and Security Executive Agent Directive 4 (Guideline H) treats illegal drug use as a concern about judgment and willingness to follow rules.6Office of the Director of National Intelligence. Security Executive Agent Directive 4 Adjudicative Guidelines Drug use after a clearance was granted is treated more seriously than pre-clearance use. Alcohol-related incidents such as a DUI or a treatment program fall under Question 24.
Turning the Form In
You do not send the SF-86C in on your own. Give it to your Facility Security Officer if you are a contractor, or to your agency’s personnel security office if you are a federal civilian. That office reviews the form and forwards it to the investigating agency.7Defense Counterintelligence and Security Agency. FAQs – Facility Security Officers
The background investigation IT infrastructure is mid-transition. The legacy e-QIP system is being replaced by eApp inside the National Background Investigation Services (NBIS) platform.8Defense Counterintelligence and Security Agency. National Background Investigation Services Whether you complete an SF-86C on paper or a comparable update inside NBIS depends on where your agency stands in that migration. Your security office will tell you which route to use.
Common Mistakes to Avoid
- Stretching employment dates to hide a gap. Report the gap with its reason and exact start and end dates; employers verify dates independently.
- Forgetting foreign contacts. A friend who is a foreign national counts, and so does ongoing contact abroad through any channel.
- Assuming state-legal marijuana is not reportable. Federal adjudicative guidelines control, and marijuana use remains reportable.6Office of the Director of National Intelligence. Security Executive Agent Directive 4 Adjudicative Guidelines
- Handwriting the form illegibly. The instructions say an illegible form will not be accepted.1U.S. Office of Personnel Management. Standard Form 86C
- Omitting arrests that were dismissed, expunged, or never charged. If your arrest history changed since the last SF-86, mark “Yes” for Question 22 and explain it in Block 3.
- Working from memory instead of your last SF-86. The whole point of the certification is consistency with what the government already has; open the prior questionnaire before you fill this one out.