We're supposed to guess what and who and post what when?... huh?
I thought I would let my gift recipient know it's me on the package. Then when I get my present from my secret santa I would post a photo of it and say "Thank you" to whomever sent it to me. It's already feeling fun and mysterious and I'm wondering who has me and how difficult I am to shop for? I guess I need this explained to me even more s-l-o-w-l-y and I'll do it however we're supposed to. Forgive this dork over here! I don't get it!
Whatever makes it more fun and enjoyable for you, do it. Just saying what folks have done in the past. No rule is set in stone or even in coal.