SMS two-factor authentication for Dropbox Sign

Two-factor authentication (2FA) provides an extra layer of security when logging into app.sign.dropbox.com. 

When a sender enables two-factor authentication, they will be prompted to enter a unique code sent to their mobile phone before logging into Dropbox Sign. 

To set up 2FA: 

1. Log in to your account.
2. Hover over your email address in the upper-right corner.
3. Select My Settings from the dropdown menu. 
4. Click the Profile tab near the top of the screen.
5. Scroll to 2-Factor Authentication and enter your mobile phone number.
6. Click Verify.

7. You’ll receive a text message with a verification code.
8. When prompted, enter the verification code you received.
9. Click Submit.