I went to Costco to get turn in my certificate of purchase and get my membership card. The register clerk, Kristen, wanted to explain the card membership to me, I said " oh that's okay, I know about it" and she proceeded to be nasty to me because I didn't want to hear about it. I did not appreciate this and than she was comparing a sick patient telling a nurse about him being sick to her explaining the membership to me is the same thing and i shouldn't have dismissed her from telling me about it. I will not be going back to that Costco location.