Optional Configuration {#wc_optional_configuration}
===================================================

These configuration options are optional.
These configuration options are enabled but may need to be enabled for your `Visa Acceptance for SMB` account to be used.

* **Tokenization** : Tick to enable the ability for merchants to save their card. Please enable this in your [Unified Checkout settings](https://developer.visaacceptance.com/docs/vas/en-us/unified-checkout/developer/all/rest/unified-checkout/uc-intro-setup/uc-intro-setup-ebc.md "") too
* **Network Tokens:** Tick to tell the extension to check for token updates prior to a registered customer checking out.
* **Fraud Screening:** Tick **Fraud Screening** to tell the extension to subscribe to the fraud management webhook notifications.
* **Checkout Version:**Pin a version of Unified Checkout v1; example format: 1.7. Leaving blank will automatically use the most recent version.
* **Message Level Encryption:** Tick to turn on Message Level Encryption.

  > Even if you do not turn on Message Level Encryption, a Response MLE certificate is still required for the Unified Checkout response Webhook notification.
  > {#wc_optional_configuration_ul_hmc_1zv_2kc}