Checkout Error: You Are Not Allowed To Update `email` Verified

If this error appears without custom code changes, check your installed apps and scripts.

If you are writing custom Javascript to update checkout attributes, ensure you are attempting to pass the email parameter if the user is already logged in. checkout error: you are not allowed to update `email`

In Shopify, if a customer is already logged in, the checkout flow locks the email address to the account holder's identity for security. If this error appears without custom code changes,

The error, then, is a security feature disguised as an inconvenience. It prevents a specific class of fraud: an attacker gaining access to your account mid-checkout, changing the email to their own, and diverting the receipt and tracking information. By locking the email field once the checkout sequence begins, the platform sacrifices your convenience for its liability protection. The error, then, is a security feature disguised

Ensure that the Access Token being used has the correct permission scopes. If you are using the Shopify Storefront API, ensure you are using the CheckoutUpdate mutation correctly and not including the email field in the input object if it is already set.