SMS Messaging Terms

Last Updated: September 11, 2026  ·  Effective Date: August 18, 2026

Contents

1. Program Description

Tether, LLC ("Tether," "we," "our," or "us") operates an SMS messaging program to support core features of the Tether mobile application. We send two types of SMS messages:

  • One-time verification codes (OTP): Short numeric codes sent to authenticate your identity during sign-in or when you update your phone number on your account. These are transactional messages required for account security.
  • Account security notices: Alerts sent to the phone number on your account when your phone number or email address is changed, so you can undo an unauthorized change. These are transactional security messages.

Tether does not send promotional or marketing SMS messages.

2. How You Opt In

2.1 Verification Codes

When you create a Tether account you agree to receive SMS one-time verification codes as part of the authentication process. That agreement is taken once, on the app's first screen, before you reach phone-number entry: the program disclosures, SMS Terms, and Privacy Policy appear directly beneath the Get Started button, and tapping it is the agreement. You then provide your mobile number and Tether sends the verification code. You must complete OTP verification to use phone-based authentication; a previously verified recovery email may provide a separate recovery path.

When changing your number later from Settings, consent is taken again at that point, with the same disclosures and an unchecked checkbox beside the new number — the sign-up agreement covers the number you gave at sign-up, not one added afterwards.

2.2 Account Security Notices

The same consent — given when you tap Get Started, or when you add a new number from Settings — covers transactional security notices sent to that number. These are sent automatically, and only, when the phone number or email address on your account changes — whether you make that change yourself or Tether support makes it on your behalf at your request.

Because the purpose of these messages is to alert you to a change you may not have authorized, they are sent to the phone number on file at the time of the change. They are never used for promotion or marketing.

3. Message Frequency

Message frequency varies based on your account activity:

  • Verification codes are sent only when you initiate a sign-in or phone-number change. Most users receive one OTP per session.
  • Account security notices are sent only when the phone number or email address on your account changes. Most users receive none; a user who updates their contact details receives one message per change.

4. Costs

Message and data rates may apply. Standard carrier messaging rates apply to SMS messages sent and received. Tether does not charge any additional fee for SMS messages. Please check with your mobile carrier if you are unsure about your messaging plan.

Carriers are not liable for delayed or undelivered messages.

5. How to Opt Out

You may opt out of Tether SMS messages at any time by replying STOP to any message you receive from us. After opting out:

  • You will receive a confirmation that you have opted out.
  • No further SMS messages will be sent to your number. STOP applies to every message type described in Section 1 — both verification codes and account security notices — not a subset.
  • Because Tether uses SMS verification codes to sign you in, opting out means you will no longer be able to sign in to Tether with that phone number, and you will no longer be alerted by SMS if someone changes the details on your account. If you previously verified a recovery email, you may still use the email recovery path.

To opt back in, reply START to the same number.

You may also manage your communication preferences by contacting us at support@tetherup.app.

6. How to Get Help

Reply HELP to any Tether SMS message for support information. You may also reach our support team at:

7. Additional Information

For information about how Tether collects, uses, and protects your personal data, including your phone number, please review our full policies:

Tether reserves the right to modify this SMS Messaging Terms page at any time. Material changes will be communicated through the app or via email where required by law. Continued use of Tether after changes take effect constitutes acceptance of the updated terms.