If you want to save a little extra on your next Sperry purchase without a Sperry coupon then all you have to do is refer a friend. To refer a friend at first you need to have a pre-existing Sperry account. 1. Log into your account and navigate to the bottom of the Sperry homepage. 2. Find Refer a Friend and click on it. Enter the email address of whoever you want to refer and click submit. 3. They will receive a $20 off Sperry discount code into their inbox and once they make a purchase of over $75 you will also receive a $20 off Sperry promo code in your inbox.