DocuSign is an online digital signatures tool that provides its users with plans that accomodates individuals, small/medium businesses and enterprises. Its features include authenticating documents, sending and receiving of documents for signing, authenticating signers of the documents, high volume sending for large businesses and enterprises and preparing as well as editing documents. Integrations with customizable API, Salesforce and Google docs is available. Mobile support is provided with a mobile app.
Yes, digital signatures are legal internationally subject to compliance with relevant laws in force. In case of DocuSign, the digital signatures with them are legal in more than 188 countries. For digital signatures, the UKDigital Signature Tools DocuSign