Got a strange gift via battle.net app

I just got a gift of several packs of cards. 5 packs I can’t open yet and 2 large packs of 50ish cards. I don’t know who from. I assumed it was a freebie from Blizzard for the anniversary.

The strange part I didn’t notice until I was clicking Claim. I happened to see something about it requiring March 12th, I think? But it only showed up now. The window was closing because I had clicked it already. Also there was some strange “product-null” description that I hadn’t registered (its late here.)

What did I just accept??

Mainly I’m worried about my account’s security. I need to know if I should change my password or something!

It sounds like you got a gift from blizzard. I recently got one too and I’m not sure why. It gave me several regular packs and a few of the big 50+card catchup packs. I found it under my blizzard launcher claim gift section just like you did. I can confirm this also happened on my girlfriends account as well.