i've lost my house

On a helpful testimonial on the IKEA returns website

I recall from when I last bought stuff at ikea they give a 1% coupon to use on your next purchase when you pay with a debit card, and you can use it regardless of whether you return the original purchase.

So, if you’ve got time on your hands - buy something for $100 with your debit card. Take the coupon for $1 and buy a bar of ikea chocolate. Take whatever you bought (and the receipt) over to returns and say you changed your mind, and get your $100 back. Free chocolate!