Definition: Nondeliverable forward contract
External debt - IMF
A nondeliverable forward contract is a foreign currency financial derivative instrument. An NDF differs from a normal foreign currency forward contract in that there is no physical settlement of two currencies at maturity. Rather, based on the movement of two currencies, a net cash settlement will be made by one party to the other. NDFs are commonly used to hedge local currency risks in emerging markets where local currencies are not freely convertible, where capital markets are small and undeveloped, and where there are restrictions on capital movements. Under these conditions, an NDF market might develop in an offshore financial center, with contracts settled in major foreign currencies, such as the U.S. dollar.
International Monetary Fund (IMF), "External Debt Statistics: Guide for Compilers and Users; Appendix I. Specific Financial Instruments and Transactions: Classifications", Washington D.C., 2003