You have no way to know how much is on each card
We purchased several Amazon gift cards ...and this is key...of varying amounts of value.  We ordered them separately in order to be able to keep track of...ARE YOU LISTENING, AMAZON?...which card was which.  Ever efficient, Amazon shipped them together, but without a packing slip confirming the value on each card by serial number.  There appears to be no way to simply look each card up by serial number to check value without having that value added to our own account...which we dont want to do, that's the whole point of giving them as gifts.  Unable to be sure what any of them is worth, we have to return them and go get other gifts.
Rating: 1 stars