Sales Order - IDOC Inbound Process

First of all, I'm not sure if this is the correct place for this thread - don't hesitate to move it.

We are integrating a new EDI process for sales.

This process includes inbounding of sales order.

How can we realize this flow?

1. Idoc is incoming from our customer.

2. Sales department checks the data of the idoc

3. If Ok , sales department will process the idoc to a VA02 sales order.

If not ok, sales department should NOT process the idoc.

How can the sales department check the data of idoc BEFORE the are inbounded?

Because with EMORD, the IDoc already must be a sales order in SAP.

Or am I wrong?

For the inbound we use the FM IDOC_INBOUND_SINGLE.

Maybe there is a flag, which inbounds the IDoc but don' generates the sales order.

Thx in advance

Christian