Disclosed are methods, apparatus, systems, and non-transitory, tangible computer-readable media associated with use of transaction authorization codes to each of the parties involved in a buying and selling transaction. In various embodiments, the transaction authorization code(s) may be exchanged between parties, and once confirmed or validated, the transaction may be consummated. In one embodiment, the transaction authorization code may conceal personal and/or financial information about a party with whom the code is associated. In various embodiments, transaction authorization codes may be used on shared or separate devices. In various embodiments transaction authorization codes may be entered through web-based interfaces or using mobile devices.