FraudWorks
All signals

Content logic layer

Format anomaly

format_anomaly

A misspelled card brand, an impossible card number fragment, or a routing number that fails its checksum.

Severity
medium
Weight
35
Layer
Content logic
Max effect
up to 35 of 100

How it affects the score

The signal contributes its weight times the detector's confidence. Signals combine so several medium findings add up, while one weak finding cannot decide a verdict.

Innocent explanations

A misread card brand or account fragment.

What to do

Look at the printed value; real routing numbers pass their checksum.

Seen in the sample · Invoice with changed bank details

Format anomaly

Routing number 021000022 fails the ABA checksum.

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