if you open your shopy your way rewards account , look where it says hi Joseph, click on that where it says my orders you should be able to scroll thru there if you used your shop your way rewards card to purchase the item. It should have the transaction id etc... in case they need it as long as you used your shop your way rewards card i have never had a problem returning an item. However with no receipt if you didn't use the card from the information i've gathered, you can't return it.
Hope this helped, I am a personal shopper if you would like to become a client underneath me i always send out kmart coupons $5.00 off $25.00 order and every month or every other month whom ever is registered under me gets some free points to spend all you have to do is click the link syw.co/1vqReKm
and follow me as your personal shopper and i can answer any questions you may have.