VI. Five types of Behavior that are Observed
Cost Environment
- The larger the standard deviation the more likely it is stolen;
- Prices below MSRP or cost; and
- Prices fluctuate per sale or buyer
Feedback Manipulation
- Low dollar items listed in first 15/30 days of account creation;
- Similar buyers and sellers in the first 30 days of feedback
Duration and IDs
- Changes User IDs frequently;
- Often changing personal names to business names; and
- Often changing account several times over a year
Buying and Selling Activity
- Normal buying activity and selling activity then it starts
Multiple of the same items for sale (high demand)
- No longer household items but brand new items for sale
System for Evaluating a Suspect’s Behavior
- Low dollar starting prices ($.01-$5.00) but the main point is it’s listed below cost;
- One-day duration of listing;
- Patterns in feedback that exhibit hidden accounts;
- Large standard deviation in items final selling value;
- Changes in User ID; and
- Grouping similar products instead of up sales, and add-ons to increase the benefit
Note: There is no single behavior that is always indicative of fraud
Concerns in Interpreting Behavior; Incorrectly interpreting the behaviors of fraud
- Identifying signs of feedback manipulation;
- Understanding the cost of goods;
- Duration of listings;
- Identifying an illegitimate business environment; and
- Not clearly establishing other fraud behaviors
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