7 Plan for financial and operational sustainability. • Sustainability. Identification systems should be designed for long-term fiscal and operational sustainability. This requires a transparent and outcomes-based approach to design to ensure that the system is fit-forpurpose and makes sustainable management and technical choices, and the adoption of business models that ensure the longevity of the system without compromising other Principles. Fees for identification services can create barriers to access, inclusion for individuals, and adoption for service providers. Efforts to recuperate costs through efficiency gains and reduced leakages must also weigh fiscal savings goals against the potential for increasing exclusion errors. Identification systems should be designed to incentivize high standards of performance for all parties involved. Principles on Identification for Sustainable Development 17