If the leaving date or term of a pupil was able to be entered into iSams/Fee Billing and Fee Billing then knew that any deposit registered as being held needed to be added to the final bill for that pupil, it would be much more efficient and need much less manual intervention.
In addition, if Fee Billing knew that when a pupil was leaving 'in advance' charges should be excluded from the final invoice for that pupil, it would mean less manual intervention and would help reduce potential for error.