I would not white-out anything on a loan application without getting the applicant to initial it. You could just draw a line through the information and note that it was provided by the applicant but not used by the bank. You can rely on the OSC to 202.13(b)(6) if you're questioned by your examiner.
6. Inadvertent notation. If a creditor inadvertently obtains the monitoring information in a dwelling-related transaction not covered by § 202.13, the creditor may process and retain the application without violating the regulation.
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Opinions expressed are mine and not necessarily those of my employer.