It is possible to link posted credit documents to a CFC futures contract where the status is Activated and/or Finished. When doing this action, the system will filter by Activated and Finished futures contracts, it should not display The user should not be able to see contracts that do not have this status, where forward rate is 0 and Posted document amount is 0.
Link CFC
Open the posted credit memo that needs to be linked to a futures contract. Under Actions and Currency Future Contracts click on Link CFC.
...
Now the Credit Memo has been linked to the futures contract and can be found under the Posted Documents tab:
...
Under the General tab, the Linked Documents Amounts will be applied:
...
When linking 
To link a second Credit Memo to a futures contract check after selecting a CFC that if there is a posted invoice that matches the credit memo we are linking.go through the same steps as shown above. The system notifies the user after selecting the futures contract.
...
If No is selected, an “Link Cancelled” error will appear and the process is stopped.
If Yes is selected, you get a check the system notifies the user if there is are more or the same number of credit documents and invoices linked to the CFC. If there are more invoices than credit memos we allow the system allows the link to go through else there is an error and the process is stopped.
...