The Adobe Approved Trust List (AATL) is Adobe's program enabling millions of people around the world to digitally sign documents in Adobe Document Cloud solutions – including Adobe Acrobat Reader, Adobe Acrobat, and Adobe Sign – using the world's most trusted digital IDs and timestamping services. Members of AATL are TSPs and CAs that provide certificate-based IDs and timestamping services to consumers and/or enterprises. In turn, those customers are enabled to sign, certify, timestamp, and validate documents using Adobe Document Cloud software solutions. Each of these providers has met strict criteria before being accepted into the program.