Brightpearl POS will check a customer's credit limit during checkout once the following conditions are met:
- You are processing a sale (Sales Order) in POS
- A customer has been associated to the basket
- The customer has a set-up credit limit in their profile
- The chosen payment method is "Pay later" (please make sure that the option "" is set to "Yes" in the POS store's configuration).
If the payment should still go through, a POS manager can override this warning. Please check the full article here.