How to implemt manager override of operations in Dynamics AX POS

Anyone has pointers to how we can implement a manager override functionality of POS operations?

The client dows not want to use the permissions functionality in AX/POS but instead wants to enable a manager to come and approve specific operations.

So the cashier would get a pop-up asking for manager credentials when performing certain operations - like returning an item or similar.

I would prefer to implement a generic solution if it’s possible to hook into any operation and then check if the specific operation requires manager approval. Otherwise I might have to find specific triggers for a limited number of operations and hook into them.

I would also need functionality that can verify manager’s credentials.

Anyone got any ideas?