Users would like to be able to see the Return Authorisation & the (RA's) Item Receipt when viewing the source Sales Order. Is there a function to do attach the IR to the SO? I tried using record.attach() but it returns

"Attaching of record type itemreceipt to salesorder is not supported."

Have you tried a saved search sublist?

had not but that's a good solution. I was thinking to add it to a script which is processing the RA, IR & closing it out.