If a telemarketer you haven’t done business with calls to ask for your bank account number for any purpose, say “No” and hang up.
Before they submit your billing information for payment, telemarketers must get your express informed consent to be charged — and to charge a specific account.
If you place your number on the national registry, you can give written permission for a company to call you.
Alternately, if you have an established business relationship, you can ask the company not to call you.
The Federal Trade Commission’s Telemarketing Sales Rule (TSR) puts you in charge of the number of telemarketing calls you get at home.