After pre-printed cards are manufactured at least a corner of each card is imaged. It is then determined whether the position and orientation of markings in the image with respect to the corner are within tolerance. If not, the card is rejected. If the markings are, or include, indicia, these indicia may be identified to allow identification of the card. This allows a determination of whether the card is in an intended order, or it allows selection of the batch into which the card is placed. It also means that cards in a given set of cards arranged in a first order can be randomized by first buffering cards in buffers and then outputting the cards to an output conveyor. In one approach, each unique card in the set is sent to a different buffer such that like cards are buffered in the same buffer. Cards are then randomly fed from the buffers to form a re-ordered set of cards such that cards in the re-ordered set of cards have an order that is random with respect to the first order. In another approach, each buffer is allocated to at least one ordinal position. Then, after determining a random order for a set of cards, individual cards of the set are fed to the buffers such that each card is fed to a buffer having an ordinal position matching an ordinal position of the card in the random order. The cards are then fed out from each of the buffers to the output conveyor based on ordinal positions of the buffers.