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Notes on getting DROP exactly right.

Mechanism-level writing on California’s deletion mechanism — standardization, composites, determinations, and what an auditor can independently re-check.

  • 01

    12 Sep 20265 min

    Not found vs could not evaluate

    DROP code 5 means both “checked, no match” and “could not be checked”: the wire format cannot tell them apart, so the distinction has to be kept on the broker’s side, at column mapping.

    • drop
    • matching
    • coverage

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