Synthetic identity fraud

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Glossary · KYC and identity

Synthetic identity fraud

Also called synthetic ID fraud, frankenstein identity fraud

Definition

Synthetic identity fraud is the creation of a fictitious person by combining real data, such as a stolen national insurance or social security number, with invented details like a name and date of birth. Fraudsters use the identity to open accounts, build a credit history and then borrow heavily before disappearing.

REAL ID NUMBERINVENTED NAMECREDIT FILECREDIT BUILD-UPBUST-OUT
Fig. 1 · Synthetic identity fraud
EGRRCPA Section 215 · CIP rule
Key rulesEGRRCPA Section 215 · CIP rule
Applies toSocial Security Administration and permitted financial institutions
RegionsGlobal · US
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How it works

A synthetic identity often passes standard checks because part of it is real and there is no existing victim to report a problem. The fraudster applies for credit, gets declined, and the application itself creates a credit file. Over months the identity gains small credit lines, pays them on time and grows its limits. The final stage is a bust-out, where every line is drawn down at once.

For banks the losses often look like ordinary credit write-offs, so the fraud is under-counted. Detection relies on checking that the data elements belong together. Firms compare names and dates of birth against issuing authority records, look for thin files with fast credit growth and link shared phones, devices or addresses across applications. AI-generated documents and faces make document checks alone less reliable.

Step 1Validate numberConfirm the identity number matches the name and birth date.
Step 2Check footprintLook for a thin file with unusually fast credit growth.
Step 3Link applicationsMatch shared devices, phones and addresses across applicants.
Step 4Test livenessConfirm a real, present person sits behind the application.
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The rules

US · 24 May 2018EGRRCPA Section 215Economic Growth, Regulatory Relief, and Consumer Protection Act, Section 215

Required the Social Security Administration to let financial institutions check, with consent, whether a name, date of birth and social security number match.

Social Security Administration and permitted financial institutions
US · 9 May 2003CIP ruleCustomer Identification Program rule for banks, 31 CFR 1020.220

Requires banks to collect identifying information and verify customer identity using risk-based documentary or non-documentary methods.

Banks, savings associations and credit unions
03

Common questions

How is synthetic identity fraud different from identity theft?

Identity theft uses a real person's full identity, and that person usually notices and complains. A synthetic identity mixes real and fake data into a new person, so there is often no single victim to raise the alarm.

Why is synthetic identity fraud hard to detect?

The identity behaves like a good customer for months. It pays bills on time and builds a credit record before the bust-out. Losses are then often recorded as bad debt rather than fraud.

Who is most targeted?

Section 215 of the 2018 US law names minors and recent immigrants as groups disproportionately affected. Their identity numbers rarely have an active credit history, and the real holder is unlikely to check soon.

Does generative AI make the problem worse?

Yes. AI tools can produce realistic documents, selfies and voice samples in minutes. That lets fraudsters create and operate many synthetic identities at scale and defeat basic document and selfie checks.