[quote name='MightySlacker']I have a bunch of duplicate codes laying around, is there any way to see if they've been used or not so i can trade them? If i tried to register a used code that was also a game I previous registered, would the "code already used" or "game already registered" message come up?
Dave[/QUOTE]
When you try to register a duplicate game, it will tell you "You've already registered this title". The code will still be active, though, so you could trade it to someone else.
The other option is to create a family account and register it under one of your children's names. Child accounts don't require any personal info (email, address, etc) just a different username and password. It WILL let you register dupllicate titles this way and it DOES give you the points. I've registered up to 3 of the same title this way (1 on my account, one for my daughter and one for my son). I got the 30 points for each (it was the same DS title). When you enter it, the text will say you've received 0 points, but the old/new point balance shows that you get the additional points.
I have no idea if they'll fix this or not, but as of now, it's working. Kinda makes me nervous if they'd ever come back and deduct the points or not. I'd say it's safer to trade your duplicate codes for a title you haven't registered, but if all else fails, you can do this to get your gold/platinum status or push your points to the level you need to order a prize. I guess if you redeem them right away they probably wouldn't give you a negative point balance if they ever tried to correct this.
As a side note, the Mario 3-on-3 basketball will let you register the code, but it politely tells you that you earn no points for registering the title (I confirmed it's not on the list in the FAQ). So for whatever reason, they don't give you credit for that one.