I got three gift cards in the mail—as part of a retailer membership—in three separate envelopes. I was sure why it was three. I was expecting one. This was a fun windfall. Until I got the email telling me there was a mistake and I should have only gotten one. But now I had to do work to make up for their mistake.
I had to log on to a website to compare numbers and pins to determine which one was still active and discard the other two. It seems like I should be able to just use any one of them and it would invalid the other two.