When signing a document, signers must authenticate themselves to verify their identity. Authentication is possible through those different options:

Security code by SMS. Your recipient will receive a security code by SMS, an "one time password" needed to sign documents. This code will be sent to the phone number entered when creating your contact. This is the authentication mode by default on your application.

Phone Authentication: If you enter a landline number for your recipient, he will then receive a phone call from a voicemail with the security code. For this option, we recommend that you inform your recipient to stay near his landline when signing.
No security code: Only for non-critical signature requests or for in-person signing. Your recipient will not need to authenticate him- or herself to sign documents, only to click on the "Sign" bouton of your invitation.

For the advanced electronic signature, the authentication method by security code is mandatory (SMS or phone call) in order to authenticate recipients. Signers will need to upload their ID as well in order to sign.

If your recipients are encountering difficulty during authentication stage, please refer to the help articles below.

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