| CPC G08B 21/24 (2013.01) [G06Q 20/204 (2013.01); G06V 20/41 (2022.01); G06V 40/166 (2022.01); G06V 40/20 (2022.01); G07G 1/0009 (2013.01); G07G 1/0036 (2013.01); G06V 20/44 (2022.01)] | 20 Claims |

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1. A method of alerting a user of a card, comprising:
determining, by a processor of a card reader, that the card is inserted into the card reader;
determining, by the processor of the card reader, an absence of the user within a vicinity of the card reader;
transmitting, by the processor to a mobile device of the user, a first message including a first code and indicating the card has not been retrieved from the card reader;
receiving, by the processor, entry of the first code;
transmitting, by the processor to the mobile device of the user, a second message including a second code;
receiving, by the processor, entry of the second code; and
instructing, by the processor, the card reader to release the card.
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