Answer:
termination statement.
Explanation:
Based on the information provided within the question it seems that the document that must be filled out by Oswald is a termination statement. This is a document that is filled out after the final installment of a loan is paid, and indicates that the loan has been fully repaid and that the individual is no longer in debt or liable. Which since Kelly repaid the full amount before the debt repayment date them she is no longer in debt or liable for the money that she borrowed.