I added my wife, also with a different last name, a few months ago, successfully using the Special Dividend. It can't be done online as they match both the postal code and last names. Email [email protected] with the request and your and your wife's Dividend Miles # and a scan of your marriage license. You can also call the club # and get a fax # to send it to.

Don't attempt this at a club. While they appear to be able to sell a new membership at the front desk, they can't do more advanced account management tasks. As to why they require the marriage cert for people who have the same legal last name and address, I don't know - different last names makes sense. In the US, copies of marriage certs are generally available at the Justice of the Peace office (or equivalent) in the county where the marriage license was issued.