Hiya,
Sorry I'm probably not much help because our experience was this:
First signed up with the society last year, whilst in FL (in a store at MGM). We filled out all the paperwork there and took our Belle membership figurine away with us.
We have been sent sketches (to the UK) ever since with no problem.
My understanding is that we have to reenrol on our year anniversary by again filling out the paperwork (I'm guessing it will be posted to us when our fee is due again) and we will then receive the figure of Ariel.
Did you pay the membership fee when you bought Ariel? Did they take your address down? If not then I guess you need to fill out the paperwork it came with or you won't get sketches. If you've already given them your details perhaps this is just a duplicate copy of the paperwork?
HTH and all the best,
Gaspodé