DANVILLE (CBS SF) – It turns out a fake cease-and-desist letter threatening penalties for non-essential construction activity posted the front door of a Danville resident’s home on Friday, was a prank, according to authorities.

The Contra Costa County Sheriff’s Office said the phony letter was designed to appear to have originated from the Sheriff’s Office.

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“Further investigation of this incident by the Danville Police Department has determined that the COVID-19 notice was put on the door by a member of the household as a prank,” said Jimmy Lee, Director of Public Affairs.

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The letter was titled, “Notice to Cease and Desist for Specific Activity” and said the reason was “non-essential construction activity,” referencing activities or businesses not allowed during the current shelter-at-home public health order because of the coronavirus pandemic. It warned of fines of $5,000 per day per violation.

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No word on whether the prankster will be facing any charges for the incident.