Unique Swap Identifiers (USI) identify a trade or contract in derivatives data reporting. The CFTC, of all international regulators, is furthest along in specifying the requirements for this trade identifier. We believe the majority of the principles can be applied internationally, as the industry seeks a globally-accepted solution for unique trade identifiers. The purpose of this overview document is to provide the industry with Design & Guiding Principles to be used for USI generation and consumption.