A bank may issue a corrected conclusive evidence certificate under a guarantee clause without losing the benefit of the clause, even where earlier incorrect certificates exist. Where a mortgagee breaches its duty to preserve mortgaged property, the loss may be assessed by reference to the cost of restoration rather than hypothetical sale prices, particularly where the evidence of hypothetical prices is unpersuasive. The question whether a conclusive evidence clause is subject to an implied requirement of due care in certificate preparation was left open.
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