WASHINGTON COUNTY, Wis. (CBS 58) -- The Wisconsin Department of Agriculture, Trade and Consumer Protection is conducting an investigation and asking any Wisconsin businesses or farms who received a letter or email from DotService.Com to come forward.

DotService.com allegedly informed people that their DOT number must be updated, or they'd be fined up to $1,000 a day and have their DOT number deactivated. 

The sender of the letter is a privately owned business and is not affiliated or associated with the DOT. The letter instructs the recipient to log into the website www.DotService.com and pay a $149.00 fee to complete their biennial update with the Federal Motor Carrier Safety Administration for their DOT registration.

The Washington County Sheriff's Office is asking anyone who paid the fee or received the letter to file a complaint with their agency.

A complaint form can be obtained by calling (800) 422-7128 or a complaint may be filed online by clicking here. 

Anyone with information is asked to call the Washington County Sheriff's Office. 

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