A condition that must precede a constructive total loss. If the insured fails to give notice to the marine insurer, the loss can only be treated as partial unless an actual total loss is proved (Marine Insurance Act 1906, s.62). An underwriter who accepts the notice admits liability for the loss. Notice is not necessary where it would not benefit the insurer. See ABANDONMENT.
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Notice given by the insured to the Insurer in Marine insurance when he considers that he has a claim for a constructive total loss and is therefore prepared to abandon the insured vessel or cargo to insurer.