Delinquent fine calculations are based on whichever Delinquent Fine Code is attached to the loan. 
Every credit union has a Delinquent Fine Code of 0 (zero) which is reserved for "No Delinquency" (no delinquent fines assessed).
In order to prevent a loan from calculating delinquent fines, the credit union would need to change the Delinquent Fine Code to the 0 fine code.  The Delinquent Fine Code field can be maintained through Tool #20 "Update Account Information."