Early payment of a debt is known as prepayment. It means paying off a loan or debt before the agreed-upon due date. This can happen for various reasons, such as wanting to avoid paying interest, or having a sudden influx of funds. Prepayment can be made in full or in part, and may incur penalties depending on the terms of the loan agreement. It is a common practice in the financial world, allowing borrowers to save money and lenders to receive their funds earlier.