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Climate Adaptation Notes is a proposed funding mechanism designed to mobilize private, commercial bank, and institutional investment for water and wastewater infrastructure in sub-Saharan Africa. The instrument combines short-term construction financing from commercial banks with long-term asset-based funding from institutional investors, utilizing 'first loss' subordinate debt from Development Finance Institutions (DFIs) to mitigate risk. The mechanism targets three tiers: the Southern African Common Monetary Union (or ZAR-tied countries), the Southern African Development Community (SADC), and the broader sub-Saharan Africa region. Success depends on the availability of deep local debt capital markets and a robust pipeline of investable projects. The instrument is currently in pre-piloting and fundraising stages.