Hannibal Police are warning of another scam. Police say the caller identifies himself as being affiliated with the police department or FBI and states that if you allow them to display signs in your yard, you will receive a free security system. Hannibal Police do not endorse any brand or company. Neither does the FBI..

Be skeptical of any unsolicited phone calls, e-mail or any other communication and do not give out or confirm personal information or bank or credit card information.

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