By purchasing something from the company, you established a business relationship with the company. As a result, even if you put your number on the National Do Not Call Registry, that company may call you for up to 18 months after your last purchase or delivery from it, or your last payment to it, unless you ask the company not to call again. In that case, the company must honor your request not to call. If they subsequently call you again, they may be subject to a fine of up to $16,000 .
An established business relationship with a company also will be created if you make an inquiry to the company, or submit an application to it. This kind of established business relationship exists for three months after the inquiry or application. During this time, the company can call you.
If you make a specific request to that company not to call you, however, then the company may not call you, even if you have an established business relationship with that company. You should keep a record of the date you make the request....
Even if you do not register with the National Do Not Call Registry, you can still prohibit individual telemarketers from calling by asking them to put you on their company’s do not call list.