Check this out.. https://www.ftc.gov/business-guidance/resources/complying-telemarketing-sales-rule#businesstobusiness I think a lot of people do things illegal until they are caught which is not advisable. this too https://www.ftc.gov/news-events/news/press-releases/2024/03/ftc-implements-new-protections-businesses-against-telemarketing-fraud-affirms-protections-against-ai#:~:text=Both%20the%20final%20rulemaking%20and,to%20allocate%20responsibility%20for%20recordkeeping. it's very important you verify they are not on the Do Not Call Registry. This is my experience, anyone else want to chime in 🙂