Puerto Rico Form Guide Last updated 10:15, 5 Aug 2016 Save as PDF This article applies to:Avalara CertCapture Certificado De Compras Exentas Modelo SC2916 Required fields: Name of seller. Purchaser’s PR ID number. At least one reason listed in section 3 (a-i). Signature of purchaser. Notes: You can find these forms in the certificate library.