validation for do not post the invoice without packing slip in MSD axapta

Validation for do not post the invoice without packing slip

Below mentioned trick How to configure a AR parameter setting? so no body can not post the invoice without packing slip? mean they must create the packing slip and then system allow them to post the invoice?
You will have to setup the Inventory Model Group for the particular item.

Inventory management > Setup > Inventory > Inventory model groups
In the Setup tab under Physical update group, check 'Receiving requirements' checkbox.