By default, when a new subscription is submitted through the Recurly.js buildSubscriptionForm, the e-mail address will be used as the account_code for the newly created account. Many merchants would prefer to use their own account_code, perhaps matching their own internal code for that customer. That way when using the API or processing push notifications, there is an easy way to reference the account_code with their own internal code.

You can easily override the default option by placing the account code in your signature. Here is an example in PHP: 

Signature script

Account Code

Recurly takes pride in providing world class support so if you have any questions about Recurly.js, please Contact Recurly Support.