How do you send an SMS to register signatories for digital signing?

I know this may sound like a silly question but can anything confirm that the BGL SmartSign facility actually works?

Hello,

Thank you for your query in regards to digital signing. Please refer to the following steps to register an individual to sign documents.

https://360help.com.au/display/SF360GS/Digital+Signing#DigitalSigning-RegistrationProcess

Once the initial document is uploaded for signing, the client will need to access the document via a received email. within the signing screen, the user will record their mobile number and receive a verification text.

Beyond this, the digital signing notifications are sent via email - whereas the sms text is used only for verification purposes only.

Please let me know if any further assistance can be provided.

Thanks.