In Canada, it is rare to find somebody with two Social Insurance Numbers (SIN). Where this happens it may be a case of clerical error or a reference to a former SIN appropriated by an identity thief. The former reason is extremely rare. In thirty years I have only encountered this once. The Canadian SIN is used as an identifier less than the SSN is in the USA.
However, in the USA the case is somewhat different. According to Susan Daniels, of Daniels and Associates Investigations, Inc. in Chardon Ohio, when searching through database aggregators such as IRB, it is common to find a subject referenced with two or three Social Security Numbers (SSN). Here are some of the reasons a person may show-up with multiple SSN’s:
- a wife’s or child’s SSN could end up with father’s name
- a parent’s SSN could show up with a child
- the subject bought something with someone else and the SSNs could end up with each other’s name
- the database producer is relating several SSN’s to one address
- an error by whoever entered the data
Susan Daniels of Daniels and Associates Investigations, Inc. (9754 Thwing Road Chardon, OH 44024, Tel.:440.286.4072) has been a Private Investigator for 15 years.