If I Prove False is a single by folk artist Cara Dillon. The single was released in conjunction with the release of her first full length DVD The Redcastle Sessions. The song became a live favourite for the singer during 2007 when she toured with guitarist and singer John Smith. The single is a duet with him, and is a traditional song. The single received airplay on national and regional radio stations, and was on the RTE Radio One playlist and BBC Radio Ulster playlist.