Sterling ws supposed to receive the award in May, according to the event invitation for the chapter's 100th anniversary dinner.
The Los Angeles Clippers issued a statement on the tape on Saturday.
"We have heard the tape on TMZ," the statement said. "We do not know if it is legitimate or it has been altered. ... We do know that the woman on the tape -- who we believe released it to TMZ -- is the defendant in a lawsuit brought by the Sterling family, alleging that she embezzled more than $1.8 million, who told Mr. Sterling that she would 'get even.'"
A spokesman for L.A. Mayor Eric Garcetti, who is also set to receive an award from the NAACP at the same event, told the Los Angeles Times that they would be looking into Sterling's comments and the award.
"In light of recent events, we will be discussing this event with the Los Angeles NAACP," Garcetti spokesman Yusef Robb said.