Combating Synthetic Identity Fraud with Phone and Email Data
Synthetic identity fraud is a growing threat, costing businesses billions annually. This article explores how leveraging cross-referenced phone and email data, combined with advanced identity verification techniques, can.

The Rise of Synthetic FraudSynthetic identity fraud involves creating fake identities by combining real and fabricated information, making it notoriously difficult to detect through traditional methods.
The Power of Phone and Email DataPhone and email verification, when cross-referenced and analyzed for risk, serve as critical data points to expose inconsistencies and flag suspicious activities.
Advanced Detection StrategiesImplementing multi-layered verification, including database validation, liveness detection, and blocklisting, is essential for a robust defense against synthetic identities.
Didit's Comprehensive SolutionDidit offers an AI-native, modular platform with Phone & Email Verification, Database Validation, and Blocklist features to help businesses proactively combat synthetic identity fraud with unparalleled accuracy and efficiency.
Understanding Synthetic Identity Fraud
Synthetic identity fraud is a sophisticated type of financial crime where fraudsters create new, fake identities by combining real and fabricated personal information. Unlike traditional identity theft, which involves stealing an existing identity, synthetic fraud builds an entirely new one piece by piece. This might include using a real Social Security number (often belonging to a child or an individual with limited credit history) alongside a fake name, date of birth, and address. Over time, these synthetic identities are used to open accounts, build credit, and eventually commit large-scale fraud, making detection incredibly challenging for businesses.
The impact of synthetic identity fraud is staggering, costing industries billions of dollars annually. Its elusive nature stems from the fact that no single piece of information is entirely fraudulent, making it difficult for standard fraud detection systems to flag. As a result, businesses need to adopt more advanced, multi-layered verification strategies that go beyond simple document checks.
The Critical Role of Phone and Email Verification
In the battle against synthetic identity fraud, phone and email data emerge as surprisingly powerful weapons. While a fraudster can create fake names and addresses, establishing credible and persistent phone numbers and email addresses that link to a consistent digital footprint is much harder. Didit's Phone & Email Verification products are designed to leverage this vulnerability.
Phone verification, often through one-time passcodes (OTPs), confirms ownership of a phone number. Beyond this, advanced systems can detect disposable numbers, assess carrier information, and assign a risk score to the number itself. Similarly, email verification not only checks for deliverability but can also analyze the domain, age of the email, and its association with known fraudulent activities. By cross-referencing these data points, businesses can identify inconsistencies that signal a synthetic identity. For example, a newly created email address combined with a disposable phone number for an account that claims a long credit history would be a major red flag.
Leveraging Cross-Referenced Data for Enhanced Detection
The true power of phone and email verification against synthetic fraud lies in their ability to be cross-referenced with other identity data points. When a user provides their personal information during onboarding, Didit's platform can analyze the coherence and consistency across all submitted data. For instance, if the phone number provided is associated with a different name or location in public records than the one claimed by the user, it immediately raises suspicion. Similarly, an email address that appears in multiple fraud databases, even if the primary identity document seems legitimate, can indicate a synthetic attempt.
Didit's modular architecture allows for the seamless integration of various verification checks. Our Database Validation feature can cross-reference user-provided data against government and financial databases in over 30 countries. This ensures that the personal details, including phone numbers and email addresses, align with authoritative sources. Discrepancies between the submitted data and verified database information are crucial indicators of potential synthetic fraud, allowing businesses to prevent fraudulent accounts before they are established.
Building a Multi-Layered Defense Against Fraud
Effective synthetic identity fraud prevention requires a multi-layered approach. No single verification method is foolproof, but when combined, they create a formidable defense. Key components include:
- ID Verification: Utilizing OCR, MRZ, and barcode scanning to verify the authenticity of identity documents. However, fraudsters can sometimes use real documents with fabricated details, so this must be paired with other checks.
- Passive & Active Liveness: Preventing deepfakes and presentation attacks by ensuring a real, live person is present during the verification process. This makes it harder for fraudsters to use stolen photos or videos.
- 1:1 Face Match & Face Search: Comparing the user's live face to their ID document and checking against existing databases to prevent duplicate accounts or known fraudsters.
- Database Validation: Verifying personal data against trusted external databases, as discussed, to catch inconsistencies in names, addresses, phone numbers, and emails.
- Blocklisting: Automatically declining verification sessions that match previously identified fraudulent documents, faces, phone numbers, or emails. This is a crucial proactive measure against repeat offenders.
Didit’s AI-native platform excels at orchestrating these complex workflows, allowing businesses to customize their risk engine for optimal fraud detection without compromising user experience.
How Didit Helps
Didit is uniquely positioned to help businesses combat synthetic identity fraud through its AI-native, modular identity platform. Our comprehensive suite of tools ensures that you can build robust, adaptive verification workflows:
- Phone & Email Verification: Our advanced Phone & Email Verification capabilities go beyond simple checks, incorporating risk scoring, disposable number detection, and carrier analysis to provide deeper insights into the legitimacy of contact information.
- Database Validation: Didit’s Database Validation feature cross-references user data with official government and financial databases across 30+ countries, making it incredibly difficult for synthetic identities to pass verification. This detects 1x1 and 2x2 matching issues, a hallmark of synthetic fraud.
- Blocklist: With Didit's Blocklist feature, you can automatically decline verification attempts from previously identified fraudulent entities, including specific documents, faces, phone numbers, and email addresses. This prevents repeat fraud attempts and strengthens your defenses over time.
- Modular Architecture: Our platform allows you to compose verification checks as needed, integrating Phone & Email Verification, ID Verification, Liveness, and Database Validation into a seamless, orchestrated workflow tailored to your risk appetite.
- AI-Native & No Setup Fees: Didit's AI-native approach means continuous improvement in fraud detection. Combined with Free Core KYC and no setup fees, businesses can deploy powerful anti-fraud measures cost-effectively and with unparalleled efficiency.
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