> For the complete documentation index, see [llms.txt](https://whitepaper.opz.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://whitepaper.opz.io/opz-app/security/anti-zero-transfer.md).

# Anti-Zero Transfer

The OPZ app has integrated a critical security feature called the "Anti-Zero Transfer" function. This feature protects users from the advanced scam tactics that exploit EVM (Ethereum Virtual Machine) transactions.

#### How the Anti-Zero Transfer Feature Works

* **Filtering Zero-Value Transactions:** The Anti-Zero Transfer setting in the OPZ app ensures that zero-value EVM transactions do not appear in your transaction history. This measure prevents scammers from using these transactions in their phishing attempts.
* **Enhancing Wallet Security:** By hiding unauthorized zero-value transactions, the OPZ app prevents the common scam tactic of making such transactions from a user's address without their knowledge or consent.
* **Maintaining a Clean Transaction History:** With this feature activated, the app filters out and hides any zero-value transactions, thus maintaining a clear and accurate transaction history for the user. This helps users to quickly and correctly identify legitimate transactions.

#### Proactive Defense Against Emerging Threats

* **Staying Ahead of Scammers:** By addressing emerging threats such as zero transfer phishing scams, OPZ ensures that its users are protected against cyber threats.

### Enabling Two-Factor Authentication (2FA) in the OPZ App

1. **Navigate to App Preferences:**
   * In the app's main interface, tap on the avatar icon (👤) to open the app's main menu.
   * From the menu list, select "App Preferences."
2. **Access Security Settings:**
   * Look for the "Security Protection" section in the App Preferences menu.
   * Tap on “Security Protection” to access your account's security settings.
3. **Enable Anti-Zero Transfer:**
   * Inside the Security Protection settings, find the option labeled “Anti-Zero Transfer”
   * Tap on the checkbox option to activate 2FA.
   * If prompted, follow any additional steps to verify or confirm your choice.


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