Start with the phone's call-history entry. Before deleting or blocking a suspicious U.S. call, save a screenshot showing the date, time, number, caller label, and duration. Keep the voicemail or text message, then add a short note about consent, any opt-out request, and your Do Not Call status.

That record can make an FCC or FTC report more specific and give a consumer-protection lawyer useful facts to review for a possible Telephone Consumer Protection Act (TCPA) claim. It won't guarantee enforcement, a settlement, or $1,500 for every call. The result can depend on the type of call, the number reached, consent, the caller's identity, and the law that applies.

This information is for U.S. consumers and isn't legal advice.

Spam call evidence checklist

Create one record for each call or text that you may need to explain later. Save:

One explained row per call is more useful than a folder of unexplained screenshots. Link each row to the original files.

What rules may apply?

A robocall uses a prerecorded or artificial voice. Some political, charitable, survey, informational, and emergency-related calls may be allowed. Sales robocalls face tighter restrictions, and the analysis can change depending on whether the call went to a cell phone or landline and whether you gave the caller permission.

The FTC's robocall guidance says that not every unwanted automated call is illegal. A scammer may still violate other consumer-protection laws even when the facts don't clearly support a TCPA claim.

The National Do Not Call Registry

The National Do Not Call Registry mainly concerns sales calls. Registration won't stop every unwanted call. A business may have permission to call, may have a recent business relationship with you, or may fall within an exempt category. Fraudsters may ignore the registry altogether.

Keep the confirmation email, completed registration page, or a screenshot showing the number and registration date. The FTC says a number generally must be on the registry for 31 days before a sales-call report is appropriate. The National Do Not Call Registry FAQs explain the registration and reporting limits.

Registry proof can support a complaint, but it doesn't identify the caller or establish that a particular call was automated.

The TCPA and possible private claims

The TCPA can apply to certain automated or prerecorded calls and texts, including some calls to cell phones without the required consent. Telemarketing rules can also restrict calls to numbers on the National Do Not Call Registry or calls made outside permitted hours. Which provision applies depends on the facts.

The commonly cited amounts are statutory damages, not automatic payments:

Consent is often central. Save the form, website page, order record, or message through which a company says you agreed to calls. Giving a business your phone number doesn't necessarily resolve every consent question. For sales robocalls, the FTC says a company can't require you to agree to those calls as a condition of getting a product or service.

If you revoke permission or ask a company to stop, preserve the exact request, the date and method, and the company's response. For background on federal TCPA requirements, see the FDIC's TCPA overview. State laws may provide additional protections.

Build the record before you block the number

1. Capture the original call record

Take the call-history screenshot before deleting, blocking, or reporting the call. If your phone doesn't show the year or time zone, add those details to your written log immediately. Mark whether the call was missed, answered, or sent to voicemail.

Phone and carrier features vary. Some offer exports; others provide only screenshots. A "Scam Likely" label is a warning supplied by a phone or carrier, not proof of who called. Record it as a label rather than as the caller's identity.

If several numbers appear to be part of one campaign, make a separate entry for each number. Add a note about the shared message, timing, callback number, or other similar behavior.

2. Preserve voicemails in their original form

Download the voicemail from the carrier or phone app if that option is available. Keep the original audio file. If the app provides a transcription, save it separately because automated transcriptions can be wrong.

A simple filename keeps files in order:

2026-03-06_1414_ET_voicemail_001.m4a

The audio may show that the message was prerecorded and may reveal a company name, product, callback number, or alleged debt. It still may not prove who placed the call, especially if the caller used spoofed caller ID.

3. Be careful with live-call recordings

Recording a live conversation can be regulated by state law. Some states require everyone on the call to consent, and a conversation involving people in different states can create additional uncertainty. Don't assume that a one-party-consent rule always protects you.

A voicemail, call log, and written account are safer records when you haven't checked the applicable law. If you plan to record a live call, check the laws in the relevant states or obtain permission before recording. Don't use a hidden-recording app without understanding the rule that applies.

If you answer an unfamiliar call, don't provide passwords, account numbers, Social Security numbers, or payment details. Write down the caller's statements after the call instead.

4. Save text messages in context

Screenshots should show:

Don't click links in suspicious messages. If you reply to a legitimate business, save the exact wording and time of your request. With a suspected scam, reporting the message and preserving it may be safer than continuing the conversation.

5. Check consent and opt-out history

A caller may later claim that you requested information or agreed to marketing. Look for records showing:

If you aren't sure whether you consented, record that uncertainty rather than guessing. If the company responds to your request, keep the email, chat transcript, or account note. A dated written record is easier to compare with later calls than memory alone.

6. Document your Do Not Call status

Keep the National Do Not Call confirmation email, completed registration page, or screenshot showing each number and its registration date. Store evidence for multiple numbers separately.

A direct request to one company is a different record from national registration. Preserve both. The registry primarily relates to sales calls, while a company-specific opt-out may be relevant to later calls from that business.

7. Keep factual impact notes

Write down what the calls caused: a missed work call, repeated interruptions, a financial loss, or time spent contacting your carrier. Add the date and retain supporting documents when you have them.

Don't exaggerate stress or losses. Actual financial harm isn't required for every possible statutory claim, but accurate notes help a regulator, carrier, or lawyer understand the pattern.

Use a simple evidence log

A spreadsheet makes repeated calls easier to compare. Use one row per call or text:

Date and time Number shown Duration Type Message or business Consent or opt-out note Evidence file
Mar. 6, 2:14 p.m. ET 555-0100 18 sec. Prerecorded voicemail Insurance offer; callback number stated No known consent 2026-03-06_1414_ET_voicemail_001.m4a

Use the time zone shown by your phone or the location where you received the call. If multiple numbers carry the same message, add a column for shared campaign details.

Keep original files unchanged. Store a backup in a private location, and use a separate working copy for notes or a transcript. Don't post the files publicly; voicemails and screenshots can contain personal information.

Ask your carrier about available records

Ask your carrier what account history or call-detail records it can provide. A monthly bill may not show every incoming call, and the carrier may limit how far back it can search. Keep the carrier's response, even if it can't provide the detail you requested.

If a private case is filed, a lawyer may be able to seek relevant records through the legal process. That doesn't mean a carrier must provide every record to a consumer on request, and a subpoena doesn't guarantee that a particular record will exist or be produced.

Choosing a complaint or legal route

Choose the route that matches what you want the record to accomplish:

Route Best suited to Include What it cannot promise
FCC Consumer Complaint Center Unwanted robocalls, texts, spoofing, and telecommunications issues Dates, times, number shown, message details, carrier, and preserved files An individual payment or a guaranteed investigation
FTC ReportFraud Scams, deceptive sales calls, and consumer-fraud patterns Caller claims, company information, loss details, Do Not Call status, and opt-out history A refund, a private lawsuit, or a guaranteed response
DoNotCall.gov Unwanted sales calls after registry requirements are met Number called, date, time, caller identity, and message Protection from every category of call
State attorney general or consumer-protection office Possible violations of state telemarketing or fraud laws The same organized evidence, plus any state-specific requirements A guaranteed personal remedy
Private TCPA review Possible compensation for qualifying calls or texts Your complete log, consent history, recordings or voicemails, and complaint records A guaranteed $500 or $1,500 award

The FCC and FTC use reports to identify patterns and support enforcement. Their complaint systems aren't substitutes for a court case. Filing an agency report generally doesn't pause a deadline for a private claim, so don't wait for an agency response before checking a possible deadline.

Write a specific complaint

Keep the narrative neutral. Include facts you know and label uncertainty:

On [date] at [time and time zone], the number displayed as [number] called my [cell or home] phone. The call was [missed, answered, or a voicemail] and lasted [duration]. It contained [brief description or exact words]. I [did not give consent, had a prior relationship, or am unsure about consent]. I asked the business to stop calling on [date and method], if applicable. The related files are [filenames].

Name a company only when the message or other evidence supports that identification. If caller ID displayed one number but the message named a different company, report both facts. Don't treat the displayed number as proof that the company made the call.

After submitting, save the confirmation page, email, or reference number. If the form doesn't accept audio or other files, keep them in your private evidence folder and say that the files are available.

Mistakes that weaken a spam-call record

Call-blocking and call-labeling tools can reduce interruptions, but they don't establish liability. Capture the record first, then block the number. Check the phone's blocked or spam folder later so relevant records aren't lost.

Common questions

Is one voicemail enough to prove a violation?

Usually not. A voicemail may show prerecorded content and identify a product or business, but the call log, consent history, Do Not Call status, and evidence of repeat calls provide important context.

Do I need to record the caller?

No. An audio recording isn't required for an FCC or FTC report, and secretly recording a live call can create legal problems. Preserve voicemails and written records unless you know recording is lawful.

Does Do Not Call registration prove that a call was illegal?

No. It can support a sales-call complaint, but exemptions, consent, the caller's identity, and the type of call still matter. Registration also doesn't stop scammers from calling.

Will the FCC or FTC send me money?

Not automatically. Agencies may use reports for enforcement. Compensation usually requires a separate settlement, judgment, or other remedy.

How long should I keep the evidence?

Keep it until the complaint is resolved and a qualified legal professional has assessed whether a claim is possible. Filing deadlines vary by claim and jurisdiction, so don't discard the records simply because you've submitted a report.

Official sources

For the next suspicious call, save the call entry and voicemail or text first, add one factual row to your log, and then block or report it through the route that matches the conduct.