No Receipt Found - Matching Issue?

Hope someone can give me a definite answer and point me in the right direction. I am not an AP consultant, but I’m trying to help out the client.

 

Running into this issue:

Create a PO – Dispatch

Create the Invoice

(Receipt is not entered in the system yet)

Run Matching – We get a Match exception

 

So far so good…..

 

They enter a Receipt

Run Matching

They still get a Match exception with that no receipt found.

 

To fix this they go into each Voucher and manually assign the receipt.

 

I was told that the Document Association could fix this….(We hope) Is PeopleSoft working as designed or is the Association incorrect. I could not find any notes or help around this….