I propose to add another option on user setup for invoice posting policy, currently we have:

Allowed - Ship/Receive & Invoice

Prohibited - Ship/Receive only

Mandatory - Invoice only (also Ships/Receives)

This is great for segregation of duties, and for easily controlling the functions without altering permissions.

I would like to add:

Only - Invoice only, without Ship/Receive

This would allow a setup where you have some users who can only ship/receive using prohibited, and some users who can only invoice, giving true segregation.