idk, any time i’ve had to do this kind of verification it’s been most recent purchases, not earliest. not saying that they couldn’t get this to work but it’s kind of a long shot
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(still probably better to be safe than sorry)
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It used to be "give us your first key" a long while back, but people have mentioned that recent purchases or a physical CD key printed on a piece of paper, with your username, from a recent activation will also work!

I keep a very specific game box in a safe place for that purpose.
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