I got this in a printout at my Safeway.

Purchase Smart Spread between 1/28/08 - 4/13/03
If you are dissatisfied with the taste of the Smart Balance Butter Spread you have purchased:

1) Circle the item and purchase price on your receipt.
2) On a 3x5 card, print your name, complete address with zip code (no PO Boxes) and phone number.
3) Mail 3x5 card with original receipt in a postage paid envelope to:

Dept No. 276
PO Box 981123
El Paso TX 79998-1123

Within 8 weeks, you will receive a check for $2.35, the average national purchase price of Smart Balance.
Limit one offer per individual/household/group. Available to legal US residents ofthe 50 US or DC ages 18 and older.
Mail must be postmarked by 4/27/08 and received by 5/4/08.

Purchase Smart Spread between 1/28/08 - 4/13/08

I received the same print out at my Kroger. It must not matter where you buy the butter.