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RISK (PAYMENT (Invoice (Duplicate - all of these tests/rules assume some…

- - - - duplicates reversed but not obviously matched to credits (complicated test in brian)
      - matched credit(s) equalling amount
      - duplicate mess involving multiple invoices and a reversal spanning multiple ones of them
      - split invoices
    - - completely different invoice numbers (one is much greater, not a x10 multiple) (-)
      - Invoice date far from entered date (100+ days?)
      - large gap between invoice dates (-)
      - different month words in invoice number (-)
      - "invoice entered by" user frequently enters confirmed duplicates
      - frequently flagged as potential duplicates (-)
      - supplier transactions frequently confirmed as duplicates
      - horrible three way check - duplicate is a combined invoice
      - long invoice numbers
      - Similar Supplier ref
      - Only transactions for same supplier
      - Similar Supplier Name
      - Similar Invoice Numbers
        
        clean invoice number same, originals different length
        
        PO number as invoice number
        
        invoice date in invoice number
        
        extra/missing character from invoice number
        
        transpositions
        
        Similar clean invoice numbers - last x digits
        
        One clean invoice number contained within other invoice number
      - Same PO number
      - Invoice number inconsistent for supplier (format or sequence)
      - infrequent/common amount for supplier/entire AP (+/-)
      - non identical amounts that are the same when rounded
      - different suppliers (-)
      - very number invoice number (-)
      - invoice number contains month and year (-)
      - recurring payment (quarterly/monthly/other) (-)
      - PCARD DUPLICATE (other checks)
      - date comparisons (entered/paid)
    - - supplier bank details recently changed
      - out of hours
      - payment details don't match
      - supplier is high risk
      - "entered by" user is high risk
      - round amount
      - missing po?
      - unusual amount
      - supplier failing benfords?
      - auth limit avoidance
      - supplier doesn't exist in MSF
      - date checks
    - - payment details don't match
      - payment amount/invoice number pattern matches a different supplier better
      - round invoice amount
      - po number as invoice number
      - Unusual Invoice number for supplier
      - 10x/100x common payment amount
      - Transaction Spike for supplier
      - supplier doesn't exist in MSF
      - Unusual Transaction Amount for supplier
  - - - recurring payments (-)
      - unusual amounts for employee
      - unusual amounts for supplier
    - - Card id checks - multiple cards per employee, same day different locations etc.
      - limit avoidance
      - Unusual amount for MCC
      - different location to other transactions for this user this day
      - different currency to other transactions for this user this day
      - Unusual Amount for employee
      - Risky Merchant
      - Unusual Amount for merchant
      - Risky Employee
        
        First use
        
        long time since last usage
        
        not long for the company
        
        no longer with company
        
        limit change
        
        history of badness