Systems and methods for updating an image registry for use in fraud detection related to financial documents

A system comprising:

• a check Image Record (CIR) database configured to store, for each of a plurality of accounts, a CIR, wherein each CIR comprises feature information related to features extracted from a plurality of reference checks associated with the associated account of the plurality of accounts;
• memory configured to store instructions;
• and
• a processor coupled with the CIR database and the memory, the processor configured to run the instructions, which cause the processor to:
• receive an image of a test check associated with an account of the plurality of accounts,
• extract feature information from the image,
• compare the features with the feature information stored in the CIR database for the account associated with the test check,
• generate a fraud score, and
• update each CIR by determining:
• T1=Test for a new check S=f(min{d(F1, Rj)}), j=1,N;
• T2=Test for the new check against the feature information in the CIR (F), determined with the feature information for the oldest check removed from the associated CIR after the feature information related with the new check (F1) is confirmed authentic, then S=f (min{d(F, Rj2)}), j2=1,N, wherein N is the number of reference checks for which feature information is included in CIR, but with the feature information associated with the oldest reference check removed;
• and
• T3=Test for the new check against F with Max(d) check removed after F1 is confirmed authentic, where Max(d) represents the check that is furthest away from F1 on plot, S=f (min{d(F, Rj3)}), j3=1,N;
• N is the number of reference checks for which feature information is included in CIR, but with the feature information associated with the reference check having Max(d) removed.