"Robocall" is a colloquial term that has hardened into a legal category. Its everyday use implies something unwanted and probably fraudulent, but the statutory concept is narrower and purely technical: it is about how the call was placed, not whether the recipient wanted it.
Two independent triggers
A call falls within the robocall rules if either is true:
- It was placed using an automatic telephone dialing system (ATDS) — equipment that stores or produces numbers and dials them automatically; or
- It delivers an artificial or prerecorded voice, however it was dialled.
The second trigger catches more callers than expected. A manually dialled call that plays a recorded message is a robocall for TCPA purposes, even though no autodialer was involved.
What makes one lawful
| Purpose | To a mobile | To a residential landline |
|---|---|---|
| Marketing / advertising | Prior express written consent | Prior express written consent, subject to exemptions |
| Informational / transactional | Prior express consent (lower bar) | Generally permitted, with limits |
| Emergency | No consent required | No consent required |
The practical consequence for outbound teams: the same dialler, calling the same list, can be lawful or unlawful depending entirely on the paperwork behind each number and the line type it reaches. That is why line type and consent records are operational concerns rather than legal footnotes.
Why enforcement is aggressive
Robocall volume has driven sustained regulatory attention — STIR/SHAKEN caller ID authentication, mandatory carrier blocking of traffic highly likely to be illegal, one-day traceback obligations, and an FCC inquiry into AI-generated voice calls. Legitimate callers feel this indirectly: carrier-level spam labelling degrades delivery for everyone originating from a number with a poor reputation.
Keeping invalid and disconnected numbers out of your dialler is therefore not only a cost question. High failure rates are one of the signals that gets a calling number labelled, which suppresses the connect rate on the numbers that were good. Scrubbing protects deliverability as well as compliance.
Frequently asked questions
Are all robocalls illegal?
No — this is the most common misconception. A robocall is lawful when you have the right level of consent for the call's purpose. Marketing robocalls to mobiles need prior express written consent; informational and transactional calls sit under a lower standard. Appointment reminders, fraud alerts and delivery notifications are all typically lawful robocalls.
Is a text message a robocall?
For TCPA purposes, effectively yes. The FCC treats SMS and MMS as "calls" under the statute, so an automated text carries the same consent requirements as an automated voice call. This is why an SMS blast without documented consent is exactly as risky as a dialler campaign.
Does manual dialling avoid the robocall rules?
It avoids the autodialer consent requirement, but not the rest of the TCPA. Do Not Call Registry rules, internal do-not-call obligations, calling-hour limits and caller ID requirements all still apply to manually dialled marketing calls.
Are ringless voicemails robocalls?
Yes. The FCC determined in 2022 that ringless voicemail drops are subject to the robocalling rules. Delivering a message without ringing the handset does not remove it from the statute's scope.