A digital signature (also known as a public key digital signature or electronic signature) is not a scanned image of a handwritten signature, nor simply a name placed on a document. It uses public key cryptography to verify digital information such as documents, emails, and macros. A digital signature provides:

• Verification: Ensures the identity of the signer.
• Integrity: Ensures the content has not been altered after signing.
• Non-repudiation: Ensures the signer cannot deny authorship of the signed content.

The purpose of adding a digital signature is to protect the document and allow users to immediately verify whether it has been issued by SGS TW, thereby preventing report forgery.

Digital signatures have been included in all testing reports submitted since 2008 (e.g., CE/2008/XXXXX), as well as reissued reports since 2008.

Digital signatures do have a validity period; however, documents signed within that period remain verifiable. Due to evolving technology and to prevent potential security risks, SGS TW periodically updates its digital signatures. SGS TW has used certificates issued by VeriSign (2007/08/22, 2009/08/20, 2011/08/18, 2017/07/20) and DigiCert (2020/08/17, 2022/06/22, 2023/06/19, 2024/06/27). For reports issued on or after July 1, 2025, no “Add to Trusted Identities” action is required. Signature information will be displayed in the top information bar when opening the PDF file.

No. The two applications will coexist as separate programs.

Yes. You may submit a request to SGS TW.