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“Routing number fails its checksum”

What this flag on a bank statement means, why it matters, and what to check.

What it means

The 9-digit ABA routing number fails its built-in checksum.

Why it matters

Every real routing number passes it. A failing one can't belong to a bank.

Ordinary explanations

What to check

Ask the applicant for the statement downloaded directly from the bank's website or app. A real statement always carries a valid routing number.

A flag is a reason to verify with the source, not proof. Apply the same steps to every applicant.

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