The former world champion was charged with an ICO in 2018.
Floyd Mayweather is one of several celebrities who are being sued for their promotion of a cryptocurrency called EtheriumMax.
A lawsuit was filed in California on Friday alleging that the celebrities and EthereumMax carried out a "bomb and dump" scheme with the tokens, by making "false or misleading statements" on social media.
Kim Kardashian used her Instagram account to post an announcement for the coin, and former world champion Mayweather mentioned the token when promoting his fight with Logan Paul last year, with EthereumMax accepted as payment for tickets to the event.
The lawsuit claims that Mayweather has not disclosed any payment for mentioning the cryptocurrency, which has lost 97% of its value since June.
Mayweather was indicted in 2018 by the SEC for promoting an ICO, a method of raising funds using cryptocurrencies, and paid more than $ 600,000 in a settlement for the charge, it reported. CNBC.
