remove a specific document from batch in Webcenter Forms recognition verifier

Hello Experts,

Having a requirement as given in below steps to get it more clear, please suggest how I can achive using WFR

1) In a mail 4 pdf documents will be present

2) two documents will be supporting document and two will be invoice document

3) when in WFR it create a batch by default it will take all 4 documents and it will create a batch

4) As I don't need supporting document I want to remove these supporting documents from batch and want to keep only invoice document.

Please advise where and How I can achieve this functionality.

Thanks

Sanjeev