How To Adjust Loans
You issue ad hoc adjustments if you need to change a loan's principal and/or current balance outside of the normal billing and payment functions.
An adjustment can:
Change a loan's payoff balance.
Change a loan's current balance (i.e., how much the customer thinks they currently owe).
Change both the loan's payoff and current balance.
Fastpath: 
For details about the adjustment types to apply, refer to Adjusting Loan Amounts. For information about creating adjustments, refer to Adjustments.