Warwickshire Police are trialling the van to help detect dangerous driving.
The vehicle, which will be stationary at the side of the road while in use, is being trialled over a period of three months.
The warning letters, issued by police, will remind drivers that they could be fined up to £500 for not wearing a seat belt in addition to penalty points.
Man dies in fatal collision on A447 Cadeby
Officers want dashcam footage of the vehicles beforehand.
Information needed as teen in critical condition after non-stop collision in Hinckley
Officers want to speak to anyone who was in the area and saw a grey VW Tiguan.
Hinckley and Bosworth MP made Shadow Health Minister
"I will continue to make representations to the Government so that we can improve healthcare both locally and nationally."
Age UK team will be on hand to help more pensioners in Leicestershire this winter
The council has said that recent figures show that 6,500 Leicestershire residents are at risk of missing out on pension credit.
Appeal following theft of Armistice Day silhouettes from Bedworth
"These two items are of real significance to our community"
Op Plenty relaunches in Nuneaton & Bedworth
Listen to Inspector Ryan Walker here.
Passengers issued warning due to road closure around East Midlands Airport
The closure will impact people travelling for early morning flights.
Festive events near you this Christmas
Towns and villages across Hinckley, Nuneaton and North West Leicestershire are preparing to switch on their Christmas lights.
Heavy Rain
16°C
Light rain shower
11°C
Sunny intervals
9°C
Heavy rain shower
7°C
11:00am - 2:00pm
Dave has Just Great Music for Sunday Lunch
2:00pm - 4:00pm
Totally 80's: Gary plays the music and speaks to the stars from the decade of big hair and big shoulder pads!
Money For Nothing
Dire Straits
Whenever, Wherever
Shakira
(It Goes Like) Nanana
Peggy Gou
Pray
Take That