Isaac Hayes' family has vowed to sue former President Donald Trump if his campaign continues to use the late soul singer's song, 'Hold On, I'm Coming' at rallies.
A letter released on social media by Hayes' family urged that Trump comply with the request by Friday, August 16.
It also demanded $3 million in license payments for the song's use at Trump campaign rallies beginning in 2022.
The letter from the family's attorney James Walker reads, "It has come to our attention that you or the campaign have authorized the illegal public performance of the song on multiple occasions during various rallies for your political campaigns without authorization from the copyright holder, despite being asked repeatedly not to engage in such illegal use by our client."
'Hold On, I'm Coming' was released in 1966 by R&B duo Sam & Dave. Hayes, who died in 2008, wrote the song with David Porter.
According to Hayes' family, the song has been played 134 times by the Trump campaign in the last two years.
The letter from Walker said the requested $3 million payment "is a very discounted fee" for the number of times the song has been used.
It warned that the family would seek a much higher payment, including attorneys' fees if they took legal action against Trump and his campaign.
The family also requested that the campaign release a statement on its social media accounts noting that they did not have authorization from Hayes' estate to use the song.
It's at least the second time in recent days that the Republican presidential nominee's campaign has been asked to stop using an artiste's song.