If enrolled customers have to go through online banking to pull their e-statements, then a valid demonstration must include navigation of your online banking system, a test pull of a sample statement, and some kind of electronic response proving the previous steps were successful.
If your account opening "ESIGN consent form" is paper, that can cover the preconsent disclosures and contain a service agreement, but you still have to confirm consent in the manner just described.
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...gone fishing.