The calls keep coming after you blocked the displayed number. What then?
Write it down. In the United States, a plain letter plus a call log is a practical first step. It won't wipe every spoofed ID off your screen. It can still get the carrier to look, and it backs the reports you send the FCC and the FTC.
A sample letter to dispute spam calls
Here's a letter you can copy. Put your own details in for every bracketed line. Use dates and facts you can prove. Leave out dollar figures you can't document.
[Your Full Name]
[Your Street Address]
[City, State ZIP]
[Phone number that received the calls]
[Email address]
[Date]
[Recipient name or Customer Relations]
[Carrier or company name]
[Official address from your bill or the company's site]
Re: Dispute of unsolicited calls to [your phone number]
Dear [Name or Customer Relations]:
I am writing to dispute unsolicited calls to [your phone number]. From [start date] through [end date], I received at least [number] calls I did not request. Some used a prerecorded or artificial voice. Some displayed unknown or likely spoofed caller ID.
I did not consent to these calls. My number [is / is not] on the National Do Not Call Registry.
Attached is a log with dates, times, displayed numbers, and a short note on what was said.
I request that you:
1. Stop these calls to my number where you can.
2. Apply or strengthen blocking for the numbers in my log.
3. Confirm in writing what action you took.
I am also reporting this matter to the Federal Communications Commission and the Federal Trade Commission. Please place this letter in my account file.
Sincerely,
[Your Full Name]Print two copies and keep one.
Federal agencies treat the online form as the real filing. Upload this letter only if that form accepts attachments.
What actually governs these calls
Marketing calls that use an artificial or prerecorded voice generally need prior express consent, especially on a cell phone. Those limits come from the Telephone Consumer Protection Act, 47 U.S.C. § 227, and from the National Do Not Call Registry.
You can still register your number. Registration limits many telemarketing pitches. It does not block every scam, survey, or debt call.
Turns out people often treat a carrier's spam filter as if it were the law. It isn't. Blocking tools are company features. Agencies look at the statute and the registry.
File the robocall, robotext, or junk-fax complaint on the FCC page on unwanted communications so it sits in their enforcement data. Read the FTC's National Do Not Call Registry FAQs next. The FTC says it uses those reports to find illegal callers by pattern, and it notes that telemarketers in its cases have paid more than $290 million in judgments. The report still helps the case. Nobody has to call you back.
Court rulings narrowed what counts as an automatic telephone dialing system, but prerecorded-voice limits and Do Not Call rules still stand on their own. A customer letter is not a lawsuit. Nobody here is promising you a payout.
Log the calls before you type a word
Log the calls first. A letter with no dates reads like a rant.
Work through this checklist:
- Date, time, and time zone for each call
- The number on the screen, even if it looks fake
- Live voice, prerecorded message, or hang-up
- The name, company, or pitch they used
- Screenshots or an exported call history
- Your Do Not Call confirmation, if you registered
Save the voicemail file, don't retype it from memory, and if the ID keeps changing, log each variant anyway, the same pitch from new digits is the usual pattern, and a stop letter to last week's displayed number often never arrives because that number was spoofed and was never a real mailbox you could reach.
Send the dispute in this order
- Export at least 30 days of call history from your phone.
- Register the number on the National Do Not Call Registry if it is not already there, and confirm the email.
- Fill the sample letter and attach the log.
- Send it to your carrier through the support path on your bill or in the account app. Use certified mail only when that carrier publishes a current address.
- File an FCC complaint online for the robocalls.
- Report it to the FTC as well if the caller wanted money, passwords, account access, or ID numbers.
- Write down the date you filed. Follow up with the carrier if you hear nothing after a couple of weeks.
Thing is, you don't need twenty agencies on day one. Build a file.
Where each version belongs
| Where you send it | Best channel | What it can do |
|---|---|---|
| Your phone carrier | In-app support or the complaint address on your bill | Account-level blocking and a written record |
| FCC | Online complaint from the unwanted-communications page | Adds your report to enforcement data |
| FTC | Do Not Call or fraud report | Helps map illegal calling patterns |
| State attorney general | Your state's consumer complaint form | Local follow-up if a real business is involved |
| The company that called | Certified mail to a verified legal address | A written stop request and revoked consent |
Skip mystery PO boxes from old blog posts because addresses go stale.
The carrier letter is not the same as a letter to the caller
Your carrier letter is a service request, so ask them to block the numbers and reply in writing. Name the firm only if you have a real address, then write that business about consent.
[Date]
[Company name and verified address]
Re: Stop calling [your phone number]
I revoke any consent to call or text [your phone number]. Do not contact this number for telemarketing. Remove it from your lists. I will keep this letter with my call log.
Sincerely,
[Your name]Don't waste postage on a spoofed ID. File the FCC and FTC reports instead. Known collectors and sellers are the exception, so write them and tell the carrier too.
What the letter will not do
A robocall on its own is not a billed charge you can reverse, so this letter will not guarantee a refund, and it will not shut down an overseas scam desk overnight because a lot of illegal callers ignore mail.
To be honest, the dull combo works better than a dramatic demand. Block, log, report, then write.
Some TCPA violations carry a private right of action. The statute allows actual loss or $500 per violation, whichever is greater, and a court may award up to $1,500 if it finds a willful or knowing violation. That's court process, not a customer-service ticket. This page is not telling you to sue, and a template is not a pleading.
Common questions
Do I still need a letter if I already filed online? The letter is mainly for your carrier and for your own records. Agencies process the online forms.
Can I send a cease-and-desist for robocalls? It's weak against anonymous spoofed numbers, though you can still send one if you can identify the business.
How do I dispute spam calls with Verizon, AT&T, or T-Mobile? Pull the form or mailing address from your account and use that carrier's current support flow. Don't reuse an address you cannot verify this week.
Should I demand $500 per call in the carrier letter? No, that figure lives in a statute about court awards, and a support letter should ask for blocking, an investigation, and a written reply.
Export last month's log tonight. Register the number if you haven't. Send the carrier version of the letter, then file the FCC and FTC reports while the dates are still easy to prove.