"If You Don't Know Me by Now" is a song written by Kenny Gamble and Leon Huff and recorded by the jersey soul musical group Harold Melvin & the Blue Notes, which became their first hit after being released as a single in 1972 topping the R&B chart and peaking at number three on the Pop chart.
The song was originally written for Labelle (a trio led by Patti LaBelle) but they never recorded it. Much like the issue with "I Miss You" and The Dells passing on it, the song's composers Kenny Gamble and Leon Huff gave the song to Harold Melvin & the Blue Notes, which featured Teddy Pendergrass as lead vocalist. In addition to the single release, the song was included on their eponymous debut album.
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