If your department receives annoying junk faxes, calls, or email messages, you may file a complaint with the Federal Communications Commission (FCC) via their web pages. If you provide enough information to indicate a possible violation of the Communications Act of 1934, as amended, or the FCC rules, the FCC will use your complaint to pursue enforcement actions against the violators.
Further information is available on the FCC's Telemarketing, Junk Fax, and Email Messaging Complaints page.
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