3DS in Practice: From Fraud Tool to Approval Lever

​3DS is usually treated as a fraud-prevention tool. In practice, it's one of the biggest levers on payment success, and one of the most underestimated sources of complexity.

​In recent transaction analyses for merchants and PSPs with significant EEA volume, we kept seeing the same pattern: teams leaving approvals on the table because of how 3DS is configured, requested and retried.

​In this live session, our CTO David Guo walks through all 20 questions from our 3DS self-test, from Rookie to Guru, and shows how each one plays out in real payment flows.

​What we'll cover

• ​Challenge vs. frictionless flows, liability shift, ECI values and one-leg transactions

• ​Challenge indicators, DDC, network tokens and soft declines

• ​SCA exemptions: which ones to use, and whether to request them at authentication or authorization

• ​3DS Data Only, Apple Pay / Google Pay, ECI and liability shift

• ​Guru level: 3RI, decoupled authentication, MIT, PReq, CAVV reuse on retries and CVC on authenticated transactions

​Who it's for

​Payment, checkout and risk teams at merchants, PSPs and fintechs, especially anyone with EEA exposure.

​Format

​45-min walkthrough + live Q&A, streamed on YouTube Live. The watch link is sent to registered guests. Recording shared with all registrants.

​Host

​David Guo, CTO at Vaelo