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Response: Hi, if a postcard from me didn't arrive you can always message me and I will resend. I'm already resending others that seemed to have got lost this week, I'll make sure a new one gets out to you as well. :)
Update, April 10: I resent the postcard twice, with no update to the rating or communication from this user. I have to assume that at least one of the three cards I sent arrived, and this user simply forgot to update or contact me.