Abstract: A personalized QR or other machine-readable code is presented by a user at an establishment where a selection of items is presented to users. In a preferred embodiment the machine-readable code is printed on or attached to a wearable accessory such as a bracelet or necklace, but could also be carried on a card, for example. The personalized QR code is created based on a person's individual preferences or restrictions. In the food/restaurant example, it is personalized based on the person's allergens. The establishment is provided with a device configured to read the QR code presented by the user and process the individual preferences so as to only present to the user a list of a subset of the available items, all of which meet the user's preferences and/or restriction requirements.