Scoring methodology for purchasing card fraud detection

A system for determining likelihood of a fraudulent purchasing card transaction using a fraud database having fraud data used in known frauds, the system comprising:

• purchasing card applicant data for a purchasing card transaction, the purchasing card applicant data including a unique identifier portion having at least one unique identifier data element, a non-unique identifier portion having at least one non-unique identifier data element, and a reference portion having at least one reference data element;
• a processor operable for determining whether any of the purchasing card applicant data matches any of the fraud data used in known frauds of the fraud database and for determining which matched purchasing card applicant data occurs in the unique identifier portion, the nonunique identifier portion, and the reference portion;
• wherein the processor is further operable for determining which at least one unique identifier data element of the unique identifier portion matches any of he fraud data used in known frauds of the fraud database for each matched purchasing card applicant data occurring in the unique identifier portion, determining which at least one non-unique identifier data element of the non-unique identifier portion matches any of the fraud data used in known frauds of the fraud database for each matched purchasing card applicant data occurring in the non-unique identifier portion, and determining which at least one reference data element of the reference portion matches any of the fraud data used in known frauds of the fraud database for each matched purchasing card applicant data occurring in the reference portion;
• wherein the processor is further operable for calculating a first match score based on each matched at least one unique identifier data element, calculating a second match score based on each matched at least one non-unique identifier data element, and calculating a total match score by summing the first and second match scores;
• wherein the processor is further operable for determining likelihood of the purchasing card transaction being fraudulent as a function of the total match score, wherein the purchasing card transaction is determined to be fraudulent when the total match score is greater than a predefined match score.