Codes are in magazines and on specially marked Kellogg's products(those are one use codes). Redeem points for coupons and merchandise.
Sign up and enter codes here: https://www.kelloggsfamilyrewards.com/en_US/home.html
Also play Spin to Win game on FB for chances to win codes and prizes daily. :
https://www.facebook.com/Kelloggs/app_315867288520405
Here is a complete list of all of the current codes that everyone can use :
KFRFREEGROCERIES – 50 points
MYFAVCHARACTER50 – 50 points
HALLOWEENPARTY25 – 25 points
JOINKELLOGG2SAVE – 50 points
HOWITWORKS20PNTS – 20 points
KFRFIBERPLUSPOLL – 10 points
REDBOOKKFR50PNTS – 50 points
GOODHOUSEMAG50PT – 50 points
FOODNEMAG50PNTS - 50 points
KFRNOWONFACEBOOK - 20 points
ERESUNGANADORHOY - 50 Points
TAKECAREOFYOU20P - 20 Points
MARIECLAIRE50PTS - 50 Points
FAVHOLIDAYCOOKIE - 25 points
KFRFAVPOPTARTS10 - 10 points
COSTOFCEREALPOLL – 10 points