The U.S. Federal Trade Commission (FTC) is preparing to penalize Twitter.According to the news in The Verge, the social media platform used their users' mail addresses and phone numbers in an 'inappropriate' way.For this reason, FTC will impose a $ 250 million fine on Twitter.Between 2013 and 2019, Twitter used users' email addresses and phone numbers for their advertising goals.The statement made in October emphasized that this is an honest mistake.FTC has ruled that Twitter is misleading to its users by not providing information on this matter. A data privacy agreement was signed between Twitter and FTC in 2011.On 28 July, the FTC sent a warning letter to the company that the agreement was violated.It was announced that the penalty would be at least 150 million and at most 250 million dollars.In the informative text he sent to the Securities and Exchange Commission, Twitter stated that the problem was not resolved.