Song: "If You Don't Know Me By Now"
Artist: Harold Melvin & Blue Notes
Peak position on the Cashbox Singles chart: #2
Number of weeks on the Cashbox Singles chart: 16
(15 weeks in the Top 100)
Weekly data:
| Week ending | Rank | Title | Artist | Label |
|---|---|---|---|---|
| September 23, 1972 | 105 | If You Don't Know Me By Now | Harold Melvin & Blue Notes | Philadelphia Int'l 3520 |
| September 30, 1972 | 83 | If You Don't Know Me By Now | Harold Melvin & Blue Notes | Philadelphia Int'l 3520 |
| October 7, 1972 | 70 | If You Don't Know Me By Now | Harold Melvin & Blue Notes | Philadelphia Int'l 3520 |
| October 14, 1972 | 60 | If You Don't Know Me By Now | Harold Melvin & Blue Notes | Philadelphia Int'l 3520 |
| October 21, 1972 | 48 | If You Don't Know Me By Now | Harold Melvin & Blue Notes | Philadelphia Int'l 3520 |
| October 28, 1972 | 27 | If You Don't Know Me By Now | Harold Melvin & Blue Notes | Philadelphia Int'l 3520 |
| November 4, 1972 | 16 | If You Don't Know Me By Now | Harold Melvin & Blue Notes | Philadelphia Int'l 3520 |
| November 11, 1972 | 8 | If You Don't Know Me By Now | Harold Melvin & Blue Notes | Philadelphia Int'l 3520 |
| November 18, 1972 | 7 | If You Don't Know Me By Now | Harold Melvin & Blue Notes | Philadelphia Int'l 3520 |
| November 25, 1972 | 4 | If You Don't Know Me By Now | Harold Melvin & Blue Notes | Philadelphia Int'l 3520 |
| December 2, 1972 | 2 | If You Don't Know Me By Now | Harold Melvin & Blue Notes | Philadelphia Int'l 3520 |
| December 9, 1972 | 6 | If You Don't Know Me By Now | Harold Melvin & Blue Notes | Philadelphia Int'l 3520 |
| December 16, 1972 | 7 | If You Don't Know Me By Now | Harold Melvin & Blue Notes | Philadelphia Int'l 3520 |
| December 23, 1972 | 25 | If You Don't Know Me By Now | Harold Melvin & Blue Notes | Philadelphia Int'l 3520 |
| December 30, 1972 | 32 | If You Don't Know Me By Now | Harold Melvin & Blue Notes | Philadelphia Int'l 3520 |
| January 6, 1973 | 57 | If You Don't Know Me By Now | Harold Melvin & Blue Notes | Philadelphia Int'l 3520 |
Rankings greater than 100 are from the Cashbox 'Looking Ahead' charts.