{"items": [{"author": "Kitty", "source_link": "https://www.facebook.com/jefftk/posts/10100120453916222?comment_id=10100120456406232", "anchor": "fb-10100120456406232", "service": "fb", "text": "I would think it's a privacy thing ... no one wants a list if everything they've ever bought at a store just sitting somewhere. I don't like that Amazon keeps that info.", "timestamp": "1573224129"}, {"author": "Jeff Kaufman", "source_link": "https://www.facebook.com/jefftk/posts/10100120453916222?comment_id=10100120456406232&reply_comment_id=10100120462149722", "anchor": "fb-10100120456406232_10100120462149722", "service": "fb", "text": "→ \"no one wants a list if everything they've ever bought at a store just sitting somewhere\"

FWIW I don't mind that they have it, and it would be useful in cases like this.

They already need to have a record of every transaction, and privacy in the form \"the computer has all the information, it's just hard to query\" goes away as people upgrade their systems.

Now, \"you need authorization to query the computer\" is good, but in each of these cases I was talking to the manager.", "timestamp": "1573227230"}, {"author": "Michael", "source_link": "https://www.facebook.com/jefftk/posts/10100120453916222?comment_id=10100120456446152", "anchor": "fb-10100120456446152", "service": "fb", "text": "This is one of the reasons that I register for the \"loyalty program\" for some stores. I gave Home Depot permission to notice when I use my primary credit card, so that they automatically connect the purchase with their loyalty program, and I can review the purchases and print out duplicate receipts on their loyalty program website. When I shop at Harbor Freight, I give my phone number, and they email me a receipt as well as handing me a paper receipt. Similar for many other stores. Yes, I know that their \"loyalty program\" is really for data collection, but I don't see any serious downside to their tracking my purchases and using the data for their purposes.", "timestamp": "1573224144"}, {"author": "Michael", "source_link": "https://www.facebook.com/jefftk/posts/10100120453916222?comment_id=10100120463462092", "anchor": "fb-10100120463462092", "service": "fb", "text": "Pharmacies do keep a record of all prescriptions, though, and in my experience, appliance stores can also easily track all your purchases.", "timestamp": "1573228256"}, {"author": "Daniel", "source_link": "https://www.facebook.com/jefftk/posts/10100120453916222?comment_id=10100120465013982", "anchor": "fb-10100120465013982", "service": "fb", "text": "Point of sale systems shouldn't store credit card numbers. They're nowhere near secure enough.

They shouldn't even store one-way hashes, because the space is too small.", "timestamp": "1573229142"}, {"author": "Jeff Kaufman", "source_link": "https://www.facebook.com/jefftk/posts/10100120453916222?comment_id=10100120465013982&reply_comment_id=10100120469709572", "anchor": "fb-10100120465013982_10100120469709572", "service": "fb", "text": "→ Daniel they store the number with the middle section masked out", "timestamp": "1573230924"}, {"author": "Martin", "source_link": "https://www.facebook.com/jefftk/posts/10100120453916222?comment_id=10100120527658442", "anchor": "fb-10100120527658442", "service": "fb", "text": "How modern were the point of sale systems at the stores that you tried this at? I\u2019m just curious because I know that startups like Toast have made their dime by improving point of sale systems for certain data queries that are business relevant (but I think that\u2019s more inventory focused?).", "timestamp": "1573253079"}, {"author": "Jeff Kaufman", "source_link": "https://www.facebook.com/jefftk/posts/10100120453916222?comment_id=10100120527658442&reply_comment_id=10100120531495752", "anchor": "fb-10100120527658442_10100120531495752", "service": "fb", "text": "→ Martin major chains, but not very modern. Everything monospaced etc", "timestamp": "1573254565"}, {"author": "Josh", "source_link": "https://www.facebook.com/jefftk/posts/10100120453916222?comment_id=10100120564509592", "anchor": "fb-10100120564509592", "service": "fb", "text": "I'm surprised that almost anyone keeps this information -- I would have thought that due to PCI, merchants would be keen to keep as little of this data around as they possibly can.", "timestamp": "1573260487"}, {"author": "Jeff Kaufman", "source_link": "https://www.facebook.com/jefftk/posts/10100120453916222?comment_id=10100120564509592&reply_comment_id=10100120602443572", "anchor": "fb-10100120564509592_10100120602443572", "service": "fb", "text": "→ If you keep little enough data that it's not useful for stealing someone's credit card then I don't see why PCI would affect this?", "timestamp": "1573264994"}, {"author": "Josh", "source_link": "https://www.facebook.com/jefftk/posts/10100120453916222?comment_id=10100120564509592&reply_comment_id=10100120607528382", "anchor": "fb-10100120564509592_10100120607528382", "service": "fb", "text": "→ Between

> You might think you could walk into the store, give them your credit card, and they could bring up a list of your past transactions.

and

> Once they find it they can check that the credit card number matches, and print off a duplicate.

I thought you were implying that the store has your credit card number recorded in their local database. Was that not what you had in mind?", "timestamp": "1573267284"}, {"author": "Jeff Kaufman", "source_link": "https://www.facebook.com/jefftk/posts/10100120453916222?comment_id=10100120564509592&reply_comment_id=10100120609768892", "anchor": "fb-10100120564509592_10100120609768892", "service": "fb", "text": "→ Josh they have enough digits that they can recognize your card, but not enough that they can run more transactions on it.", "timestamp": "1573268691"}, {"author": "Josh", "source_link": "https://www.facebook.com/jefftk/posts/10100120453916222?comment_id=10100120564509592&reply_comment_id=10100120685557012", "anchor": "fb-10100120564509592_10100120685557012", "service": "fb", "text": "→ Ah, I see, and PCI apparently allows you to keep the first six and last four, which is probably good enough for this sort of thing.", "timestamp": "1573320045"}, {"author": "Lisa", "source_link": "https://www.facebook.com/jefftk/posts/10100120453916222?comment_id=10100120668386422", "anchor": "fb-10100120668386422", "service": "fb", "text": "It's easy to return things at Target because they can bring up your transactions if you have the card with you. I don't know if they can bring up everything or if the computer just finds it when they scan the item.", "timestamp": "1573314775"}]}