Methods and systems for facilitating and authorizing electronic transactions with various devices and systems are disclosed. Embodiments of the present invention utilize audio messages to initiate, process and complete transactions between two or more parties, allowing users to efficiently and effectively enter into and complete financial transactions with businesses and other users. The need to utilize text-based entry as part of the verification process—an inefficient, error-prone and insecure authorization mechanism—is minimized and, in some embodiments, avoided altogether. Unlike recently developed authorization methods, embodiments of the present invention may be implemented using any number of existing devices including, analog or digital televisions, radios, smartphones, tablets computers, and other devices. Embodiments of the present invention may also be utilized to facilitate authorization for various other transactions including to access to an account, website or other locations, to accept or propose trades, to sign a legal or non-legal document, and to verify identity.