Response Code
1A — Soft Decline (3DS Required)
ISO 8583 Response Code 1A
Meaning: Soft Decline (3DS Required)
Action / Description
Strong Customer Authentication (SCA) required. Retry with 3D Secure.
Decode and Verify ISO 8583 & EMV Transactions
Use IsoFluent's suite of 100% client-side tools to parse full message logs and decode complex TVR/TSI values instantly.