| CPC G06Q 30/0625 (2013.01) [G06K 19/06037 (2013.01); G06K 19/0723 (2013.01); G06K 19/07758 (2013.01)] | 16 Claims |

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1. A system comprising:
a reusable physical tag that is attachable and detachable to a product including
a housing with a first side including a quick response (QR) code corresponding to a tag code identifying the tag, and
a near-field communication (NFC) chip including a memory storing a code corresponding to the tag code;
a first user device;
a second user device including at least one of a QR code scanner and an NFC chip reader; and
a server including
a processor,
a database containing information associated with the product and an item listing for said product received from the first user device and linked to the tag code, and
a non-transitory memory storing instructions that, when executed by the processor, cause the processor to receive the tag code from the second user device,
transmit information associated with the item listing to the second user device, and
initiate an anonymous chat conversation between the first user device and the second user device using a dedicated chat application operative to initiate a private, secure, and anonymous chat based on at least one of an NFC tag code, QR code, and/or an alphanumeric code.
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