Advertising Matter

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What constitutes “advertising”? What does not constitute “advertising”? When is it permissible to send advertising without the recipient’s consent? How can one refuse to receive advertising or revoke previously given consent?

Advertising can be a commercially distributed message aimed at encouraging the purchase of a product or service, or encouraging the expenditure of funds in another manner, or a message distributed to the public to solicit donations, among other examples detailed in the article Spam: The Complete Guide for the Harassed.