Summary

by John Marshall Harlan Leather Manufacturers' National Bank v…

But where forged checks have been paid and charged in the account and returned to the depositor, he is under no duty to the bank to so conduct the examination that it will necessarily lead to the discovery of the fraud. If he examines the vouchers personally, and is himself deceived by the skillful character of the forgery, his omission to discover it will not shift upon him the loss which, in the first instance, is the loss of the bank. Banks are bound to know the signatures of their customers, and they pay checks purporting to be drawn by them at their peril.
Source: Wikisource

by John Marshall Harlan Leather Manufacturers' National Bank v…

And in respect to persons equally innocent, where one is bound to know and act upon his knowledge, and the other has no means of knowledge, there seems to be no reason for burdening the latter with any loss in exoneration of the former. There is nothing unconscientious in retaining the sum received from the bank in payment of such notes, which its own acts have deliberately assumed to be genuine.
Source: Wikisource

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