Again, depends on the country and the laws of that nation. I'm Canadian: https://crtc.gc.ca/eng/phone/telemarketing/reg.htm https://crtc.gc.ca/eng/phone/telema

Again, depends on the country and the laws of that nation. I'm Canadian: https://crtc.gc.ca/eng/phone/telemarketing/reg.htm https://crtc.gc.ca/eng/phone/telemarketing/reg.htm you don't need to use specific terms and they have 14 days to stop calling you. in my case they continued to call and so i used the "complaint and enforcement" numbers on that page and reported them. have not been contacted since.