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If I want to issue an AU on my Amex TU, does the AU need to be a member of Costco?
anyone?
Yes, additional cardmembers must be Costco members. In fact, you'll be asked for the additional users membership # and the card will not be approved or sent until Costco verifies that the applicant is an active member.
I have been trying to add my gf to my Costco TE card for nearly 2 months for this very reason. When I got the card, I was a secondary member on my father's executive business account. After getting my own membership and adding my gf to the account, I requested an additional card for her, and the request was denied because her account was not linked to my father's account. I needed to change the Costco account associated with my TE card before I could add her as an additional user.
Did any credit pull happen?
Whatever you do, if you request an AU card for the Costco card, do so in the store. Otherwise, you'll have to wait a couple of weeks if you apply online, just as with the primary card.
No hard inq that I'm aware of, but I believe that they do soft the AU applicant, because AmEx holds AU's responsible for purchases made on their card.