> For the complete documentation index, see [llms.txt](https://help.impact.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.impact.com/other/reference-documentation/two-factor-authentication-faqs.md).
# Two-Factor Authentication FAQs
impact.com requires you to enable two-factor authentication (2FA) for logins to your impact.com account. This requirement safeguards your account from irregular login activities and protects your valuable information like brand deals, assets, and more. 2FA secures your account against logins from attackers exploiting weak or stolen credentials.
How does 2FA work?
You can set up 2FA so that any account user signing in to your impact.com account from an unsaved device will be required to log in via 2FA. Upon first signing in, an account member will receive a verification code on their mobile device via SMS, email, or an authentication app.
How will I receive verification codes?
You’ll receive verification codes via one of the following methods:
* SMS
* Email
* Authentication app
How long is the 2FA verification code valid for?
Codes sent by SMS or email are valid for 10 minutes. Authenticator app codes refresh about every 30 seconds. If you receive multiple codes during this window, any one of the codes will be valid.
If you request a new code by selecting **Resend Code**, a 30-second countdown timer appears. You cannot request another code until the timer expires.
You can request up to 3 messages in 5 minutes and 6 messages in 60 minutes.
I reached the verification-code request limit
Stop requesting codes and wait 60 minutes before trying again. Each new request during the wait counts toward the limit and restarts it. If you still cannot get a code after an hour, [contact support](https://app.impact.com/support/portal.ihtml) and include the error message. Support can switch your verification method to email.
I am not receiving an email verification code
Wait briefly, then check your spam and junk folders. Check whether your organization's email-security filter blocked the message. Ask your mail administrator to allowlist impact.com email or domain.
After completing these checks, retry only within the request limits. If the issue continues, preserve the error message and [contact support](https://app.impact.com/support/portal.ihtml). Provide a screen recording of the verification steps and error for escalation.
Not receiving your 2FA SMS?
Wait briefly because mobile carriers can delay text messages. These checks apply to SMS-delivered codes only.
However, SMS verification is not supported in all countries. For unsupported countries, the default 2FA verification method is email.
If you need help activating 2FA, [contact support](https://app.impact.com/support/portal.ihtml). Preserve the error message. If troubleshooting does not resolve the issue, provide a screen recording of the verification steps and error for escalation.
Can I avoid signing in with 2FA each time?
On the verification screen, **Remember this device** is selected by default. A remembered device skips 2FA for 30 days from your last login. You will be asked again after 30 days, on a new device, or when you sign in from a different location. Clear the checkbox on shared or public computers.
Can I share my login credentials with others?
No. Each person needs their own login credentials. You can invite account users. If you're a brand, see [Invite Account Users](/brand/what-would-you-like-to-learn-about/account-administration/account-settings/invite-and-manage-users/invite-account-users.md). If you're a partner, see [Invite & Manage Partner Account Users](/partner/what-would-you-like-to-learn-about/account-management/account-settings/user-management/invite-and-manage-partner-account-users.md).
Can I opt out of 2FA?
No. You cannot opt out when mandatory 2FA is enabled. You can change your number at any time, but you must verify it first to save the new phone number.
How can I change my phone number for 2FA?
Learn how to add or change your phone number [as a partner](/partner/what-would-you-like-to-learn-about/platform-features/dashboard/manage-your-partner-user-profile.md) or [a brand](/brand/what-would-you-like-to-learn-about/account-administration/account-settings/invite-and-manage-users/manage-user-information-and-settings.md).
What if I don’t have a mobile device?
You can verify by email or with an authenticator app instead of SMS.
Does 2FA work internationally?
Yes, 2FA works internationally. SMS/emails will reach all of our supported countries.
**See the translated languages**
* Afrikaans (af)
* Arabic (ar)
* Catalan (ca)
* Chinese (zh)
* Chinese (Mandarin) (zh-CN)
* Chinese (Cantonese) (zh-HK)
* Croatian (hr), Czech (cs)
* Danish (da)
* Dutch (nl)
* English (American) (en)
* English (British) (en-gb)
* Estonian (et), Finnish (fi)
* French (fr)
* German (de)
* Greek (el)
* Hebrew (he)
* Hindi (hi)
* Hungarian (hu)
* Indonesian (id)
* Italian (it)
* Japanese (ja)
* Kannada (kn)
* Korean (ko)
* Malay (ms)
* Marathi (mr)
* Norwegian (nb)
* Polish (pl)
* Portuguese - Brazil (pt-BR)
* Portuguese (pt)
* Romanian (ro)
* Russian (ru)
* Slovak (sk)
* Spanish (es)
* Swedish (sv)
* Tagalog (tl)
* Telugu (te)
* Thai (th)
* Turkish (tr)
* Vietnamese (vi)
## Additional 2FA help documentation
* [Enable User-Level Two-Factor Authentication](/other/reference-documentation/enable-user-level-two-factor-authentication.md)
* [Log in with impact.com Two-Factor Authentication](/other/reference-documentation/log-in-to-your-impactcom-account.md)
* [Manage 2FA for Brand Accounts](/brand/what-would-you-like-to-learn-about/account-administration/account-settings/invite-and-manage-users/manage-2fa-for-brand-accounts.md)
* [Manage 2FA for Partner Accounts](/partner/what-would-you-like-to-learn-about/account-management/account-settings/manage-2fa-for-partner-accounts.md)
* [Manage 2FA for Agency Accounts](/agency/what-would-you-like-to-learn-about/account-settings/manage-2fa-for-agency-accounts.md)
* [Reset Your Authenticator App for 2FA](/other/reference-documentation/reset-your-authenticator-app-for-2fa.md)
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