It's true, unless you're one of the 12 or so who were legitimately sold a copy early, I don't think Nintendo is going to give any of us a break, but back when you sent that we still didn't know for sure, so it was worth a shot.
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Fun fact: receipt manipulation falls under the category of "retail theft" and in most states is a felony for infractions of over $150. Considering Nintendo and the store you're trying to rip off will just add up the retail value of all the games you're trying to regain online access to, well, whatever you do, don't tell the other inmates why you're really in there.