Coins for Change is due to end tomorrow, but the stamps are now available to earn on Club Penguin Rewritten!
You can earn stamps by donating coins at any Donation Stand, and theres three to earn with the highest being 10K! If you’ve already donated, you should already have the stamp appear in your stampbook.
Note:
It appears that donating before the stamps were added won’t mean that you already have the stamps

The newspaper is also going to be coming tomorrow instead of today since it’ll contain the Coins for Change results.
Waddle on!
-Torres 126
I looked through my stamp book and the stamps weren’t added on mine. What should I do?
They should be in the Party section, please clear cache if they don’t appear. 🙂
what section are they in because i have donated 50k and i have no new stamps and i cant find the stamps in the stamp book
They should be in the Party section, please clear cache if they don’t appear. 🙂
It seems like you need to re-donate unfortunately.
Stamps aren’t in the stamp book?
In addition to this comment, the stamps are now in the game but they don’t carry over if you already donated, you have to donate again to get the stamps.
It seems that is the case, which is a bit odd as it wasn’t what hagrid said yesterday. Hmm…I don’t think it’ll be fixed though.
They should be in the Party section, please clear cache if they don’t appear. 🙂
I donated over 20000 before and I never got a stamp 😦
Don’t worry though I’m mining to get some coins to donate again 🙂