The best way to do this is to create a zero BRO following the below steps (as long as the rule is set to allow zero postings) and allocate the receipt/bills/disbursements against each other:
From the Main Menu go into General Postings.
Select BRO and click NEW.
Put in the matter and all the details.
Select the allocation window and allocate the SCN/SIB or BPO against the BRO/TCO/TOC if these come back to zero.
Click the Floppy Disk icon.
Then select POST.