A card assembly comprising a display portion and a transaction card is provided. The display portion comprises a substantially planar substrate. The transaction card comprises a substantially rectangular and substantially planar substrate having first and second short edges and first and second long edges. The transaction card further comprises at least one magnetic stripe having a card identification number encoded thereon. The at least one magnetic stripe is substantially parallel to the long edges. The transaction card is detachably coupled to the display portion at a coupling interface located along one of the short edges. The card assembly may be configured so that the transaction card can be inserted into a card-reading device while the transaction card is still attached to the display portion.