Enabling Message-Level Encryption {#visa-bank-acc-val-enable-mle}
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You must enable Message-Level Encryption (MLE) to send Visa Bank Account Validation API requests to `Visa Acceptance Solutions`. For more information, see [Enable Message-Level Encryption](https://developer.visaacceptance.com/docs/vas/en-us/platform/developer/all/rest/rest-getting-started/restgs-jwt-message-intro/restgs-mle-intro.md "") in the *Getting Started with REST Developer Guide*.