Sometimes on a call from a survey company, the caller will ask if they can make a follow-up call. If you agree, then a for-profit company associated with the survey company can call you with a sales pitch. So, don't just ask them to call later to get them off the phone.
You should also be careful when signing up for sweepstakes and free product offers. The fine print may include your permission to receive telemarketing calls from affiliated companies. If you do get telemarketing calls after signing up for a sweepstakes, again just firmly state you want off their list.
Under the Do Not Call rules, most businesses can't hit you with prerecorded telemarketing messages, also called robocalls, without your written permission. Political robocalls and informational robocalls, such as those received from health care providers, banks and schools, are still allowed, though.
3. Cellphones and Do Not Call
Every year or so, a hoax burns like wildfire through email inboxes and social networks warning that all cellphone numbers are about to go public. Register your mobile number right away! It also says there's a deadline to register your cellphone, and, once registered, it only blocks your number for five years.