# Account & security

> Sign-in, two-step verification, team members, roles and your profile.

Source: https://support.billingmart.com/account-and-security
Updated: 2026-10-17

- [Turn on two-step verification](https://support.billingmart.com/account-and-security/two-step-verification.md): Add an authenticator app as a second sign-in step on the web, iPhone or Android, and learn when BillingMart asks for the code.
- [Sign-in sessions and devices](https://support.billingmart.com/account-and-security/sessions-and-devices.md): Stay signed in for 30 days on a device you choose, see and forget remembered devices, sign out of every device, and choose how long Confirm it's you waits.
- [Change your email or password](https://support.billingmart.com/account-and-security/change-email-or-password.md): How to reset a forgotten or old password, why a Google account has no BillingMart password, and what to do today to change the email you sign in with.
- [Roles and permissions](https://support.billingmart.com/account-and-security/roles-and-permissions.md): What owners, admins, staff and viewers can open and change, how limits to one business work, and how the Activity log shows who did what.