“具有证明文件的”可以翻译为“accompanied by/with supporting documents” 或者 “having/with proper documentation” 。
例如：
This product must be accompanied by supporting documents to prove its origin and quality.（这款产品必须具有证明文件，以证明其产地和质量。）
All applicants should have proper documentation when submitting their requests.（所有申请人在提交申请时都应具有证明文件 。 ）