Example : Company ABC make a lump sum payment for Company XYZ and himself.
First, Go to A/R – A/R Receive Payment
Create the OR as normal.

Go to G/L > Account Maintenance
Create a new Other Payment account
This account is a temporary account for transfer unapplied amount. This account will be zero after transfer unapplied amount.
Go to A/R > A/R Refund Entry
Create a new refund for Company ABC and select “Payment Contra” as Payment method and knock off the OR.
** This document is to transfer unapplied amount into “Payment Contra” account and let Company XYZ to use, not an actual refund.

Go Back to A/R – A/R Receive Payment
Create a OR for Company XYZ and select “Payment Contra” as Payment method, continue knock off Company XYZ outstanding.
