Technical evaluation demonstrates erroneous QR code readouts across two decoders despite successful error correction, highlighting the necessity of downstream business validation.
QR code error correction is not a mechanism that guarantees the value is correct once correction succeeds. Using sample images and measurements from two different decoders, this article explains why a symbol can be read as a different value depending on where the damage lands, and what validation the business system on the receiving end needs. Archived version of https://comcomponent.com/en/blog/qr-decoded-value-validation/, as published on 2026-08-30. The live article is maintained and may change after this date. First published 2026-07-25.
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Go Komura (2026) studied this question.
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