Originally Posted by
flyer4512
This may be because Barclay ( at least with the USair card) has you add the SSN of authorized users
You linked to an application for the credit card page. When you already have the travelocity card and are logged into your account, you add users and no where does it ask for their SSN.
Yes, it it probably is the address being the same which allows them or the CRA to find the person and have the AU card added to their report.