Regulatory Sandboxes allow companies to pilot novel offerings with real customers while regulators observe risks and benefits before establishing permanent rules. Participants typically receive conditional authorization, restricted customer scope, and close regulatory monitoring during the testing period. The UK Financial Conduct Authority pioneered this approach in 2016 to foster fintech innovation without compromising consumer protection. For example, a cryptocurrency exchange might test new trading mechanisms with limited transaction volumes before full licensing. Sandboxes help regulators develop informed, proportionate rules while giving innovators clarity on compliance expectations and market entry pathways.