Taken from Help:
NetSuite Applications Suite - SuiteCommerce Customer Management (
oracle.com)
Not all users registering on your website remain active customers. Passwords expire for web store customers who meet either of the following criteria:
• The customer has not logged in within the previous three years.
• It has been more than 90 days since the customer registered a login name and created a password, and the customer never logged in again.
If such a customer attempts to log in, they receive an error message that their password has expired. They can create a new password using the standard ‘forgot password’ functionality.