Placing one's number on the National Do Not Call Registry will stop most, but not all, unsolicited calls.
The following are exceptions granted by existing laws and regulations.
• The registry only applies to residential lines, not to business lines.
• A person may still receive calls from political organizations.
The organization Citizens for Civil Discourse has announced plans to close this loophole by developing a National Political Do Not Call Registry where voters can register their phone numbers and ask politicians to take the "Do Not Contact Pledge".
• A person may still receive calls from charities.
• A person may still receive calls from those conducting surveys.
• A person may still receive calls from companies with which he or she has an existing business relationship for up to 18 months after his last purchase, payment, or delivery from it, unless person specifically asks the company not to call again.
• A person may still receive calls from a company up to three months after submitting an application or inquiry to that company, unless the company is specifically asked not to call.
• A person may still receive calls from bill collectors (either primary creditors or collection agencies.). These callers are, however, regulated by other laws, such as those limiting them to calling during "reasonable hours." Some creditors may not call debtors who file for bankruptcy protection.