I never knew this but apparently if you use RZ coupons on an item and then return it, you can basically redeem the RZ coupon's value back onto your debit card.
I bought a mouse last week and used my RZ coupons on it but I returned it since the bluetooth kept disconnecting on my work laptop. They put the balance of the RZ onto my debit card.
I don't know why they don't just give you a gift card instead, as people can easily exploit this to just get redeem the RZ coupons for money.
I think it depends on the CSR.