How to Check a Duct-Cleaning Call Before You Book in Canada

You pick up a call from a local number. The person on the other end offers duct cleaning at a great price and has an opening this afternoon. It sounds reasonable — until you realize you did not ask for the call, cannot verify the company, and have no idea whether the number on your screen is real. An unsolicited call is not automatically a scam, but caller ID alone cannot tell you which calls are legitimate.

This guide gives you a repeatable eight-step verification process built from official Canadian consumer and telemarketing guidance. Use it before you book, before you pay, and before you let anyone into your home.

Why duct-cleaning calls deserve a specific check

Duct cleaning sits at a specific intersection in Canadian telemarketing: it is a real service offered by legitimate businesses, and it is also a category the Competition Bureau explicitly names in its deceptive-telemarketing guidance. The CRTC has documented non-compliant telemarketing in this sector dating back to a 2015 investigation of Greater Toronto Area air-duct-cleaning companies, which found foreign call centres, caller-ID spoofing, and sales tactics that misled consumers about who was calling and why.

These are historical enforcement cases — they do not mean every unsolicited duct-cleaning call in 2026 is fraudulent. They do mean that a consumer answering an unfamiliar number has no easy way to distinguish a licensed local contractor from a lead generator routing calls through a spoofed local number. The verification steps below close that gap.

For broader guidance on scam calls beyond this single category, see our guide to stopping scam calls in 2026.

The 8 checks — before you book

Work through these in order. A single missing answer is not automatically proof of a scam, but the fewer checks a caller can satisfy, the stronger the case for hanging up.

1. Ask for the legal business name

Write down the company name, the caller's name, the business address, and a callback number. Do not rely on the name or number shown on caller ID — it can be altered. A legitimate business should be able to give you a registered business name and physical address without hesitating.

2. Ask why they are calling

A telemarketer should clearly state who they work for, what they are offering, and the purpose of the call. Vague answers, a changing story, or a refusal to explain the offer before you share your postal code are reasons to end the call.

3. Get the complete offer in writing

Request the exact service scope, total price including taxes, any restrictions, cancellation terms, and anything that could become an extra charge — for example, sanitizer treatments, filter replacements, or mould inspections not included in the base price. Do not accept "today only" or "the truck is in your neighbourhood" as a reason to skip this step.

4. End the call and verify independently

Find the company's website and phone number yourself — through a search engine, a provincial business registry, or a trade association directory. Check that the business name, address, and service area match what the caller told you. Call the independently sourced number. Do not call back a number the caller supplies during an unsolicited pitch.

5. Compare before booking

Get another quote where practical — even one rough estimate from a company you find yourself. Be cautious about unusually low prices, guaranteed savings, claims that immediate work is required, or pressure to let someone into the property before you have had time to verify.

6. Keep sensitive information private

Do not share passwords, PINs, one-time codes, banking details, government identifiers, or remote access to a device. A legitimate service quote does not require any of these. If a caller asks for a credit card number to "hold the appointment" before you have verified the business, treat that as a red flag.

7. Keep a record

Save the date and time of the call, the displayed phone number, the company name the caller gave, any written offer or text messages, voicemails, receipts, and notes on what was said. These records matter if you later need to file a complaint or dispute a charge.

8. Use the right reporting route

Reporting is covered in detail below. The short version: the National DNCL for unwanted telemarketing, the Competition Bureau for deceptive marketing, and the Canadian Anti-Fraud Centre if money or personal information was lost.

Caller ID is not proof

VoIP software lets a caller set the displayed number to almost anything — a local area code, a business name, even a real government number. The CRTC's caller-ID spoofing guidance and its air-duct-cleaning enforcement actions document this exact pattern: consumers saw what looked like a local number and assumed the caller was a nearby business.

STIR/SHAKEN, the Canadian caller-ID authentication framework, has made progress against basic spoofing, but calls routed through overseas gateways or partially authenticated networks arrive with weakened signals. A "verified" label is one input; it is not proof. If a caller claims to represent a known company or government agency, hang up, find the official number on the organization's website or a previous bill, and call it yourself. For more on how spoofing works in practice, see why spam calls appear to come from your own number.

DNCL and legitimate-company responsibilities

Canada's National Do Not Call List at lnnte-dncl.gc.ca is free to register and binds legitimate Canadian telemarketers. Registering can reduce the volume of legal telemarketing calls you receive. However, deceptive operators and overseas call centres often ignore the list entirely — register anyway to cut the legal noise, but do not expect it to stop every unsolicited duct-cleaning call.

The CRTC's guidance for HVAC, heating, cooling, and duct-cleaning companies makes several points that are useful for consumers to understand: companies are responsible for the conduct of employees and lead generators acting on their behalf; businesses must understand their DNCL registration, subscription, and internal do-not-call obligations; and list-scrubbing and calling-rule requirements apply even when a third party places the calls. An unsolicited call can violate telemarketing rules even when a real service is offered — the rules cover how the call was made, not only what was said.

If a visit is already booked

If you booked from an unsolicited call and have not yet had the service performed, you still have options:

• Do not admit access or make payment until you have independently verified the business. A legitimate operator who values their reputation will understand the delay.
• Verify the business now using the same steps above: search for the company yourself, check reviews from unrelated sources, and confirm the business name and address match what you were told.
• If something does not match, cancel the appointment in writing. Keep a copy of the cancellation and any response.
• If you already paid and suspect deception, contact your financial institution immediately and report to the Canadian Anti-Fraud Centre.

If someone is already at your door claiming to be from a duct-cleaning company you did not independently verify, you are under no obligation to let them in. Ask for identification and a written scope of work. If they cannot produce both or pressure you to decide immediately, close the door and report the incident.

Where to report

Use the right channel for the specific problem. Filing in the wrong place delays the complaint reaching the agency that can act on it.

• Unwanted telemarketing or a National DNCL concern: National Do Not Call List / CRTC at lnnte-dncl.gc.ca. Use this for unsolicited sales calls from a number you believe should be registered, or for calls that continue after you have registered on the DNCL.
• False or misleading claims about a product or service: Competition Bureau at competition-bureau.canada.ca. Use this when a telemarketer made claims you believe are deceptive — for example, about pricing, the service itself, or who they represent.
• Suspected fraud or money/personal information lost: Canadian Anti-Fraud Centre at centreantifraude.ca. Also contact your local police and your financial institution when money moved or personal information was shared.

For legitimate HVAC and duct-cleaning operators

If you run a legitimate HVAC or duct-cleaning business and use telemarketing or lead generators, the CRTC holds you responsible for how those calls are made. The official guidance at crtc.gc.ca/eng/phone/telemarketing/tobligations/hvac-cvc.htm covers National DNCL registration and subscription, internal do-not-call list maintenance, and the rules that apply even when a third-party lead generator places the calls on your behalf.

Making your verification easy is a competitive advantage: publish your business name, address, and license or registration details clearly on your website; encourage prospects to verify you; and never pressure someone to book before they have had time to check. The consumers who do the work are the ones who become long-term clients.

Quick decision card

If you take nothing else from this guide, remember the three-part test:

No independent match + no written scope + pressure to act = do not book from the call.

If the caller claims to be from a known provider or government agency: hang up, find the official number yourself (website, bill, account portal, or the back of a card), and call that number. Caller ID alone does not authenticate anyone.

Source and methodology

This guide summarizes official Canadian consumer-protection and telemarketing guidance as of August 2026. It is not legal advice and cannot determine whether any specific caller or company is legitimate. It intentionally does not publish or maintain a blacklist of phone numbers or companies.

• CRTC, Caller ID Spoofing: crtc.gc.ca/eng/phone/telemarketing/identit.htm
• CRTC, Telemarketing and unwanted calls: crtc.gc.ca/eng/phone/telemarketing/
• CRTC, HVAC/heating/cooling/duct-cleaning company obligations: crtc.gc.ca/eng/phone/telemarketing/tobligations/hvac-cvc.htm
• CRTC, 2015 air-duct-cleaning enforcement result: canada.ca/en/news/archive/2015/03/crtc-announces-result-telemarketing-investigations-number-air-duct-cleaning-companies.html
• Competition Bureau, Deceptive telemarketing: competition-bureau.canada.ca
• Competition Bureau, 2025 telemarketing-scam warning: canada.ca/en/competition-bureau
• Get Cyber Safe, phone-scam protection: getcybersafe.gc.ca
• Finance Canada, 2026 National Anti-Fraud Strategy discussion paper: canada.ca/en/department-finance

Keyword-demand context (Ahrefs Canada estimate, observed August 8, 2026): "duct cleaning scam" approximately 150 searches per month, KD 1; "air duct cleaning scam" approximately 90 searches per month, KD 0. These are third-party estimates, not guaranteed traffic or confirmed Google search volume. No Canadian government body reviewed, requested, approved, or endorsed this guide.

Frequently asked questions

Are all unsolicited duct-cleaning calls scams?

No. An unsolicited call is not automatically a scam, and many legitimate HVAC and duct-cleaning businesses use telemarketing. However, the Competition Bureau specifically names air-duct-cleaning services in its deceptive-telemarketing guidance, and the CRTC has documented non-compliant telemarketing and caller-ID spoofing in this sector. The issue is that a consumer cannot tell from caller ID alone whether the caller is legitimate. The checklist on this page gives you a repeatable verification process.

How do I know if a duct-cleaning caller is legitimate?

Ask for the company's legal business name, address, and a written scope of work with total price. Then end the call and verify independently: find the company's website and phone number yourself, check reviews from unrelated sources, and call back on the independently sourced number. A legitimate business will not object to you verifying. A caller who pressures you to book immediately, refuses to provide a written quote, or asks for sensitive personal information should not be trusted.

Can caller ID prove a duct-cleaning company is real?

No. Caller ID can be spoofed using VoIP software, and the CRTC has documented caller-ID spoofing in air-duct-cleaning telemarketing investigations. A number that looks local, displays a business name, or even matches a real company's listed number does not prove the caller works for that company. Always verify by independently sourcing the number and calling back.

Where can I report a deceptive duct-cleaning call in Canada?

For unwanted telemarketing or a National DNCL concern, report to the CRTC through lnnte-dncl.gc.ca. For false or misleading telemarketing claims, report to the Competition Bureau. If you lost money or shared personal information, report to the Canadian Anti-Fraud Centre at centreantifraude.ca and contact your local police and financial institution.

Does the National Do Not Call List stop duct-cleaning calls?

Registering on the National DNCL at lnnte-dncl.gc.ca can reduce calls from legitimate Canadian telemarketers, and legitimate HVAC businesses are required to respect it. However, deceptive operators and overseas call centres often ignore the list entirely. Register anyway to cut the legal noise, but do not expect it to stop every unsolicited duct-cleaning call.

Last reviewed: August 11, 2026.