Credit limit
The credit-limit of a Customer (Debtor) is the amount of unpaid Sales invoice amounts that are allowed to be outstanding for that Debtor at any given time. The credit limit for a Debtor is defined in the Customer record for that Debtor.
Users are prevented from Dispatching items for a Customer if the invoiced value of those items (combined with any other unpaid Sales Invoices) would take that Customer over their credit limit. A user with Administrator permissions for Dispatches can override this restriction.