Yes, electronic signatures in Adobe Sign are legally binding. Electronic signatures are recognized as legally binding and valid in the law of virtually every developed country worldwide. Even in less developed countries, regulations are being introduced to govern their use. For instance, in the United States, the ESIGN Act was passed in 2000, allowing the use of binding electronic signatures in most legal situations. In the European Union, the eIDAS regulations (Electronic Identification and Trust Services) have been in force since July 2016. Similar regulations have also been introduced in other countries.