Unless I'm missing something, she's right...You just scan the giftcard, and it will be exactly like she was returning with a credit card. The items would be linked to that card if that's the one she used to purchase them. Now, if they didn't come up on the giftcard, that's different, but you can absolutely do a return off of a giftcard.
Oh, I'm well aware.
It wasn't a matter of me being unable to do the return.
I wasn't willing to do it without the receipt because the items in question are typically purchased with manufacturer coupons.