Manual Remittance: Remains unposted but all payments have been posted

Hi All, 

We have an interesting scenario and hoping that someone can provide insights on this matter. 

  1. Payments (GESPAY) are created and can only be posted thought the Remittance (GESFRM) function.  
  2. Remittance function posted all the payments, but remittance remains UNPOSTED, confusing the users. 
  3. Cannot update the remittance transaction, as there are no reference tables on the screen. 

How can we update the remittance to POSTED?