SentiLink Flags Surge in Identity Theft and Bot Attacks in 2H 2025 Fraud Benchmark

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SentiLink has released its third semiannual Fraud Report, providing a data-driven view of identity fraud trends from more than 236 million account applications in the second half of 2025. Drawing on activity across credit cards, auto and consumer lending, DDAs, and telecom partners, the company reports rising volatility in fraud patterns, including record identity theft levels during the December holiday period and the first published benchmark for first-party fraud.

According to SentiLink, identity theft peaked at 6.75% in the week of Christmas, while a large-scale bot attack briefly drove one auto lending partner’s identity theft rate close to 35%. DDA fraud surpassed 10% for the first time, telecom fraud remained elevated around the iPhone 17 launch, and assumed identity abuse is becoming more organized, with online marketplaces selling “expat” identities.

The report introduces an average first-party fraud rate of just over 3%, which remains relatively stable compared with more coordinated attack types. At the same time, synthetic identity fraud eased slightly from roughly 67 basis points to 48 basis points over the half, averaging 58 basis points, suggesting some improvement in controls even as other fraud categories accelerate.

Industry segmentation shows credit cards with a mean identity theft rate of 2.82%, influenced by targeted rings, auto lending at 4.21% heavily skewed by the bot campaign, and other consumer lending with relatively low fraud at 0.75% except for a December spike tied to “same-name” schemes. DDAs recorded mean identity theft above 10%, while telecom partners experienced average identity theft above 9% alongside persistently high synthetic fraud.

SentiLink’s CEO, Naftali Harris, noted that the company’s vantage point across more than 500 institutions, including many of the largest U.S. banks, credit unions, and telecom providers, enables early detection of emerging patterns such as attacks leveraging legacy PII, FAFSA-related fraud, and schemes targeting professional athletes. The report, which includes signal-level analysis, geographic heat maps, temporal patterns, case studies, and a methodology appendix, is designed to help financial and telecom executives calibrate fraud risk, benchmark performance, and guide investment in identity verification strategies.