Trust service providers are companies that offer a wide range of secure identity and transactions services, including certificate authority services. For example, the EU eIDAS Regulation defines a class of TSPs that are accredited to issue digital IDs in each of the EU member states. Documents signed with these IDs meet the highest level standard called qualified electronic signature (QES), which has the same legal value as a handwritten signature and ensures mutual recognition across all member states. Adobe Sign lets you work with your choice of TSPs to sign and timestamp documents, so you can comply with laws or regulations governing your specific country or industry. During the validation process, Adobe also confirms that the authorities being used in the document are trusted providers – approved through global, regional, or industry-specific accreditation. Trust lists, such as the Adobe Approved Trust List (AATL) and the European Union Trusted Lists (EUTLs) are fully supported in Adobe solutions.