Originally Posted by
MG49
You do have to register. It's a simple one click process after logging into the site. Not sure if you can do it from the app, but I would think so.
But do start spending. No matter when you register (so long as it's by the deadline of about 6/14) you get the 5% - even retroactively.
Linky:
https://creditcards.chase.com/freedom/activate