Synthetic identity

What it is

Unlike classic identity theft (pretending to be you), synthetic identity fraud invents someone new. Criminals might pair a real SSN — sometimes a child's or a little-used number — with a made-up name and address, then build credit slowly.

Victims may not notice for years, until collection calls, credit-report errors, or IRS issues appear under their number.

How it works

1. Assemble — Real PII fragments are combined with invented details.
2. Bootstrap — Small credit lines, fintech accounts, or utility listings establish history.
3. Farm — The synthetic person builds a score with on-time payments.
4. Bust-out — Large loans or purchases are taken, then abandoned.
5. Fallout — The real SSN holder deals with disputes and damaged records.
6. Data breaches and data brokers make raw materials easier to obtain.

Red flags

• Credit reports showing unfamiliar thin-file accounts tied to your SSN
• Collection notices for a person who shares your SSN but not your name
• IRS or benefits issues suggesting another filer used your number
• Denied credit for reasons that do not match your real history
• Address or employer entries you have never used
• Children's SSNs with unexpected credit activity

What to do if you’re targeted

• **Pull credit reports** for yourself (and minors in your household if appropriate) and dispute synthetic accounts in writing.
• **Consider a credit freeze** to block new tradelines you do not authorize.
• **File at IdentityTheft.gov** if your SSN is being misused; keep a detailed case log.
• **Contact creditors and bureaus** listed on the suspicious accounts.
• **Protect SSNs** — do not share unless necessary; be wary of phishing for verification.
• **Optional:** monitoring and a free identity scan for broader exposure signals; insurance up to $1M is subject to policy terms.

Related terms

• Identity theft
• Personally identifiable information (PII)
• Data breach