Franw - you can use the postcard since it has your address. That is what I was told when the same thing happened to me on Friday. I have received 2 postcards addressed to my 2 brothers - I make the reservations for the family. I called and they said it was ok since it was my address.
Now why I never get one in my name - I guess it is because I always have a vacation booked from year to year and they can see that we come back with or without a postcard. I do use the codes that are found here and at mousesavers, but this time I used theirs too!
I have tried ordering the video, in english and spanish. I have been registered on their wb site for years, I have the Visa and I have been interviewed in the parks - not one of these have given me a postcard or e-mail - go figure!