Embodiments are described in which information from multiple devices is merged through the exchange of linking information. For example, a two dimensional barcode is used associate information originating from different devices. In embodiments, information is associated with various levels of trust based on a variety of factors to quantify whether or not and to what extent collected information can be relied upon to be accurate. In embodiments, information from multiple sources is merged into a common transaction record that can be accessed through use of the linking information so the information can be efficiently retrieved even though it originated, or was captured, by different devices.