The short answer
Consent capture is the record that makes a call defensible. The requirement is not that consent existed but that you can prove it: who agreed, to what, when, through what interface, and with what disclosure in front of them. For automated calling that proof is the difference between a defensible programme and an indefensible one.
In detail
A complete consent record is more than a boolean. It should hold the identifier consented for, the timestamp, the exact disclosure text shown or spoken, the mechanism — web form, recorded call, signed document — a reference such as an IP address or session identifier, and the scope of what was agreed. Scope is the field most often omitted and most often decisive, because consent to service notifications is not consent to marketing.
Consent expires in practice even where no statute names a period. A record from years ago attached to a number that may since have been reassigned is weak evidence, and many organisations set an internal maximum age after which consent must be refreshed. Consent obtained by a third party is weaker still: purchased lists routinely arrive with consent records that do not name the organisation actually placing the call.
Revocation has to flow back into the same system that authorises dialling. A record that captures consent but has no path to mark it withdrawn will keep authorising calls after the person has asked to stop, which is the exact scenario that produces liability. Consent and suppression are two states of one record, not two independent datasets.
Related terms
TCPA
The TCPA is a US federal statute restricting telemarketing calls, automated dialling, prerecorded and artificial voice messages, and unsolicited texts.
Do Not Call
Do Not Call refers to the registries and internal lists of numbers that must be suppressed from telemarketing contact.
Opt-out keyword
An opt-out keyword is a word or phrase that, when spoken or sent by a recipient, is treated as a request to stop being contacted.
Audit trail
An audit trail is an append-only record of significant actions in a system, capturing who did what, when, and to which resource.