To enable this feature
Navigate to My Account
Click the Manage link in the left-hand navigation
Next, click Edit in the left-hand navigation
Scroll to the Account Management section to find Accounts Past Due: Order Handling
Select one of three options
Allow - No restrictions
Block Sales Rep Users - Only Admin users can place an order for past-due accounts
Block All Users - Reps and Admins are blocked from placing orders for past-due accounts
Then click Save
Once enabled, the past-due account will not appear in the Order's Account selector.
If "all users" are selected, and an unconfirmed order is created before the account becomes past due, admins cannot confirm the order once the account is past-due
This only applies to desktop and mobile web order placements.