A card accessory device comprising: a connector configured to receive at least a first end of a card, the first end of the card not containing a chip; an attachment arm extending from the connector; a housing connected to the attachment arm opposite the connector; a rumble pack at least partially contained within the housing; one or more processors (102,310); and a memory storing instructions that, when executed by the one or more processors, are configured to cause the card accessory device to receive, from a terminal in communication with the card, one or more messages, preferably comprising a complete message indicative of successfully reading the card and a read error message indicative that there was an error in reading the card; identify one or more predetermined sequences, based on the one or more messages; and perform via the rumble pack, one or more predetermined vibration sequences, preferably comprising a first vibration sequence associated with the complete message and a second vibration sequence associated with the read error message in a predetermined pattern, wherein: - the connector comprises an electrical contact surface configured to contact a mating electrical contact surface of the card; - an external power source is associated with the terminal and supplies power through the chip of the card and on to the electrical contact surface of the connector; and - the card accessory device forms a circuit with the card and the terminal such that the terminal can detect when the circuit is completed by the card accessory device (100,200). a connector configured to receive at least a first end of a card, the first end of the card not containing a chip; an attachment arm extending from the connector; a housing connected to the attachment arm opposite the connector; a rumble pack at least partially contained within the housing; one or more processors (102,310); and a memory storing instructions that, when executed by the one or more processors, are configured to cause the card accessory device to receive, from a terminal in communication with the card, one or more messages, preferably comprising a complete message indicative of successfully reading the card and a read error message indicative that there was an error in reading the card; identify one or more predetermined sequences, based on the one or more messages; and perform via the rumble pack, one or more predetermined vibration sequences, preferably comprising a first vibration sequence associated with the complete message and a second vibration sequence associated with the read error message in a predetermined pattern, wherein: - the connector comprises an electrical contact surface configured to contact a mating electrical contact surface of the card; - an external power source is associated with the terminal and supplies power through the chip of the card and on to the electrical contact surface of the connector; and - the card accessory device forms a circuit with the card and the terminal such that the terminal can detect when the circuit is completed by the card accessory device (100,200). receive, from a terminal in communication with the card, one or more messages, preferably comprising a complete message indicative of successfully reading the card and a read error message indicative that there was an error in reading the card; identify one or more predetermined sequences, based on the one or more messages; and perform via the rumble pack, one or more predetermined vibration sequences, preferably comprising a first vibration sequence associated with the complete message and a second vibration sequence associated with the read error message in a predetermined pattern, wherein: - the connector comprises an electrical contact surface configured to contact a mating electrical contact surface of the card; - an external power source is associated with the terminal and supplies power through the chip of the card and on to the electrical contact surface of the connector; and - the card accessory device forms a circuit with the card and the terminal such that the terminal can detect when the circuit is completed by the card accessory device (100,200). - the connector comprises an electrical contact surface configured to contact a mating electrical contact surface of the card; - an external power source is associated with the terminal and supplies power through the chip of the card and on to the electrical contact surface of the connector; and - the card accessory device forms a circuit with the card and the terminal such that the terminal can detect when the circuit is completed by the card accessory device (100,200).