How do you produce the 855 for your customers?

[Lincoln]

I have three customers that require an 855. Right now we "cheat" and only produce fully accepted 855s by triggering an ORDRSP IDOC when the sales order is created in SAP. I would like to know how other SAP shops handle the creation of an IDOC for fully functional 855s, one that can send negative responses when an order fails due to a bad material number or backorder/partial info like many customers request.