Goods receipt slip for certain suppliers

[limando]

Hi all, 

I am trying to configure the print output for output type WE03 (GR Note Version 3) for certain vendors. Background of this comes from the requirement, that certain vendors ask for a GR confirmation with a signature from customer. I have maintained a corresponding condition record for a specific vendor in MN21

Somehow, if I create GR for a PO (movement type 101) for a different vendor than stated in the condition record, the system still generates an output. How can limit the output generation to vendors maintained in the condition record? 

Also If I add another condition record for a different supplier, I get an warning message and saving is not possible.

Is there any additional configuration needed to fulfill this requirement? 

Thanks and regards