Rules of Origin verification: importers must provide specified origin information and exercise reasonable care before foreign verification is sought. Guidance prescribes that COO verification may arise from certificate defects, mismatched signatures/seals, doubts on compliance with product-specific or regional value criteria, or random selection; importers must furnish a prescribed minimum data set and exercise reasonable care for accuracy before authorities initiate verification with partner country Verification Authorities. CAROTAR requires bill of entry modifications for required declarations and mandates use of an ICES repository for specimen signatures/seals, with alternative measures for non-EDI locations and referral to the Board when specimens are unavailable.