What makes a Social Security number fake

A fake Social Security number is one that either doesn't exist in the Social Security Administration's records or was issued to someone else. It's different from a number that's straightforward wrong — a typo or misremembering. A fake number won't match any real person's identity when checked against SSA records.

Fake numbers fall into a few categories. Some are completely made up — random nine-digit combinations that no one has ever been issued. Others are real numbers stolen from someone else and used fraudulently. A third group includes numbers that were issued but are being used by the wrong person, either through identity theft or deliberate fraud.

The SSA itself never issues numbers that start with 000, 666, or 900–999. If you see a number in one of those ranges, it's automatically invalid. Numbers in the 000–003 range in the middle section are also never issued. These patterns make it straightforward to spot obviously fake numbers at a glance.

Key Takeaways

  • Social Security numbers starting with 000, 666, or 900–999 are never issued by the SSA and are automatically fake.
  • A fake number might be completely made up, stolen from someone else, or a real number being used by the wrong person.
  • Employers, lenders, and government agencies check Social Security numbers against SSA records to verify they're real and match the person claiming them.
  • If you discover someone is using your Social Security number, report it to the SSA, the Federal Trade Commission, and your local police department.
  • You can request a replacement Social Security number from your local SSA office if yours has been compromised.

Why employers and lenders verify Social Security numbers

When you provide a Social Security number to an employer, bank, or government agency, they run it through verification systems to confirm it's real and belongs to you. These checks happen during hiring, loan applications, credit checks, and benefit claims. The organization is protecting itself from hiring someone with a fake identity or lending money to someone who doesn't exist in their records.

If a number comes back as invalid or doesn't match your name and date of birth, the employer or lender will ask you to provide a corrected number or additional documentation. In some cases, they may deny the process outright. This is why using a fake number — whether intentionally or by mistake — creates when ready problems.

What happens if you use a fake Social Security number

Using a fake Social Security number, even unintentionally, can have serious consequences. If you're explore for a job and provide an invalid number, the employer will likely reject your process or ask you to correct it. If you knowingly provide a fake number to obtain employment, credit, or benefits, you can face criminal charges for fraud or identity theft.

The penalties vary depending on the situation. Providing a false Social Security number on a job process or loan form is a federal crime. Employers are required to verify your number through the E-Verify system, which cross-checks against SSA and Department of Homeland Security records. If there's a mismatch, your employment can be terminated.

If you've made an honest mistake — you misremembered your number or wrote it down wrong — contact the organization when ready and provide the correct number. Most employers and lenders will accept a correction without penalty if it's done promptly.

How to check if a Social Security number is valid

You can perform a basic validity check yourself by looking at the number's format. A real Social Security number has nine digits divided into three sections: area (first three digits), group (middle two digits), and serial (last four digits). The area number should not be 000, 666, or 900–999. The group number should not be 00. The serial number should not be 0000.

Beyond these basic rules, you cannot fully verify a Social Security number without access to SSA records. Employers use E-Verify, a federal system that checks the number against SSA and immigration databases. Lenders and credit bureaus have their own verification systems. If you need to verify someone's Social Security number for legitimate business purposes, you must use an authorized verification service.

If you're concerned that your own Social Security number might be fake or has been compromised, contact your local Social Security office. Bring your birth certificate, state ID, and proof of citizenship or legal residency. They can confirm whether the number in their records matches your identity.

If your Social Security number has been stolen or misused

If you discover that someone else is using your Social Security number, act quickly. First, contact the Social Security Administration directly at 1-800-772-1213 or visit your local SSA office. Report the misuse and ask about your options, which may include getting a new number.

Next, file a report with the Federal Trade Commission at IdentityTheft.gov. This creates an official record of the fraud and gives you access to recovery resources. You should also file a police report with your local police department or the police department where the fraud occurred. Keep copies of all reports.

Contact your bank, credit card companies, and any other financial institutions where you have accounts. Ask them to flag your accounts for fraud and review recent activity. You may want to place a fraud alert on your credit report, which tells lenders to verify your identity before opening new accounts in your name. You can request this from any of the three major credit bureaus: Equifax, Experian, or TransUnion.

Getting a replacement Social Security number

If your Social Security number has been compromised or you're a victim of identity theft, you can request a new number from the SSA. You'll need to visit your local Social Security office in person — you cannot request a replacement number online or by phone.

Bring your original Social Security card (or a statement showing your number), a state-issued ID or passport, and proof of citizenship or legal residency. The SSA will issue you a new number on the spot. There is no fee for this service.

Keep in mind that getting a new number doesn't erase your old one from records. Your credit history, employment history, and other records tied to the old number remain associated with it. A new number gives you a fresh start for new accounts and applications, but you'll need to update your information with employers, banks, and government agencies.

Frequently Asked Questions

Can I tell if a Social Security number is fake just by looking at it?

You can spot obviously invalid numbers: any that start with 000, 666, or 900–999 are never issued. You can also check that the middle two digits aren't 00 and the last four digits aren't 0000. Beyond these patterns, you need access to SSA records to verify whether a number is real and belongs to a specific person.

What should I do if an employer says my Social Security number is invalid?

Contact the Social Security Administration to confirm your number is correct. Bring your Social Security card or a statement showing your number. If there's an error in SSA records, they can correct it. If you've been providing the wrong number, get the correct one and give it to your employer right away.

Is it illegal to use someone else's Social Security number?

Yes. Using someone else's Social Security number is identity theft and fraud, both federal crimes. This applies whether you do it to get a job, open a credit account, or obtain benefits. Penalties include fines and imprisonment.

How long does it take to get a replacement Social Security number?

The SSA issues a replacement number the same day you visit your local office, provided you bring all required documents. You'll receive a new Social Security card in the mail within one to two weeks.

Will getting a new Social Security number fix my credit if it's been damaged by fraud?

A new number gives you a fresh start for new accounts, but it doesn't erase damage done under your old number. You'll need to dispute fraudulent accounts and negative marks on your credit report separately. File a dispute with each credit bureau and provide copies of your identity theft report and police report as evidence.