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A furnisher can choose, when referred a dispute for investigation, to verify or correct with only one or two CRAs, and either voluntarily delete or let the CRA delete based on lack of verification or corrrection.
It is not necessary that a dispute produce the same outcome with each CRA.
What exactly was the specific information that was disputed as being inaccurate, and what was the finding by the CRAs in their required Notice of Results of Reinvestigation?