8. The computer-implemented method of claim 6 , wherein a representation of a first subset of characteristics extracted from the plurality of other negotiable documents is stored in a public document validation profile associated with the account, wherein the public document validation profile is shared by the financial institution holding the account and at least one other financial institution, further comprising: comparing the characteristics extracted from the image with the first subset of characteristics extracted from the plurality of other negotiable documents to produce a comparison result.
8. The computer-implemented method of claim 6 , wherein a representation of a first subset of characteristics extracted from the plurality of other negotiable documents is stored in a public document validation profile associated with the account, wherein the public document validation profile is shared by the financial institution holding the account and at least one other financial institution, further comprising: comparing the characteristics extracted from the image with the first subset of characteristics extracted from the plurality of other negotiable documents to produce a comparison result. 9. The computer-implemented method of claim 8 , wherein a representation of a second subset of characteristics extracted from the plurality of other negotiable documents is stored in a private document validation profile associated with the account, wherein the private document validation profile is available only to the financial institution holding the account.