This technical report examines the distinction between regulatory clarity and audit-grade evidence in EU-Brazil supply chains. It argues that regulatory tools, calculators and compliance screening systems can help identify exposure, but they do not create the documentary evidence required to support procurement review, buyer due diligence, legal scrutiny, financing analysis or board-level risk governance. The report introduces a supplier evidence architecture perspective for cross-border circular value chains, with emphasis on reverse logistics, electronic waste, product traceability, supplier documentation, custody records, emissions-related data, due diligence files and buyer-ready evidence. The analysis is particularly relevant for Brazilian suppliers and EU-linked companies exposed to CSDDD, CBAM, EUDR, CSRD, the Digital Product Passport logic under the Ecodesign for Sustainable Products Regulation, and data protection expectations associated with corporate asset and IT disposal processes. The report also presents the Supplier Evidence Failure Index (SEFI) as a practical conceptual model for identifying documentary weaknesses that may affect contract continuity, procurement confidence, regulatory defensibility and sustainable finance readiness.