Police are urging people to make sure their cars are registered on Island.
In a post on social media - the Roads Policing Unit says it regularly receives reports of UK/Foreign vehicles sitting for long periods of time- unregistered.
However, officers say although the vast majority are booked in for their test or in the process of being Manx registered.
The waiting list for the Test Centre is about eight weeks at the moment - with some vehicles belonging to visiting key workers.
Authorities warn for those who don't follow the rules, their cars will be seized.
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