Even though I am on the "DO NOT CALL LIST" I get several calls a day....and it's my fault! Banks, credit card companies, insurance companies, etc. have the right to share my information unless otherwise advised.
To opt out I have to send "Cease & Desist" letters to every company where I have given my information. The notifications come perhaps once a year and are in small print stating the privacy policy of the company and specific address of where to send a cease order. The notices come separately or with a lot of papers along with a bill.(Information has been sold numerous times already.)
Contests and online ordering also have a box somewhere on the form to check if more information is desired or if you would like to receive special offers from their partners.
I've done this to myself and now I have to live with it!!!!!