Associating a Specific Item with Each Customer with Barcodes or QR Codes

[plantprogrammer]

Hi, Square support team,

I was wondering if the following hypothetical situation would be possible with Square:

• We would like to create an item that would be specific to a person, so basically we would want to have a barcode or QR code for this item, which would be tied to a person. One item associated with each customer.
• The stock of this item would correspond to the number of lessons they bought.
• If they were to check-in and come to the store, we could reduce the inventory by scanning the QR code or barcode associated with the item of the person.
• (Could the transaction price be reduced to $0, assuming they paid in full at the beginning to allow this scenario?)

[JustinC]

Ultimately, session tracking isn't available with Square. You can't sell an item for $0. Some Sellers use Recurring Invoices as a workaround. 

@plantprogrammer