If you are reviewing how you manage credit limits checks for shipments going out there is one parameter that might be something to experiment with if you want to change the check from the default. You can find it in the warehouse management tab of the accounts receivable parameters called display credit limit check dialog at warehouse release. The effect of this is to display an additional dialog box if you use the release to warehouse process on a sales order.
Here is a quick overview.
AX2012 R3 CU10