1. Write a trust cheque as in below:

2. Deposit this trust cheque to your general bank, enter Pay Unbilled disbursement as in below:

3. After payment applied, there should a positive disbursement and a negative payment both are unbilled in Disbursement, and they are zero out each other with same disbursement code. Those 2 entries won’t show up on bill, unless the disbursement code setting with “Group into one line item on bills” disabled.