# Unsubscribe mechanism

The way a recipient indicates, at no cost, that they no longer wish to receive messages.

**Source:** “(a) set out prescribed information that identifies the person who sent the message and the person - if different - on whose behalf it is sent;” [Canada's Anti-Spam Legislation (S.C. 2010, c. 23)](https://laws-lois.justice.gc.ca/eng/acts/E-1.6/FullText.html)

See also: [Commercial electronic message](/reference/glossary/commercial-electronic-message), [Express consent](/reference/glossary/express-consent), [Existing business relationship](/reference/glossary/existing-business-relationship).

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Published 2026-10-29. Web page: https://www.mackenziebowes.com/reference/glossary/unsubscribe-mechanism