Police are warning residents about entering into negotiations with travelling tarmac layers.
A Sussex Police spokeswoman said reputable tarmac layers and builders did not generally make cold calls.
She said: "Any work that is carried out after people are approached in this way is usually shoddy.
"We recommend residents do not deal with these people but mark down their registration numbers and call the police on 0845 6070999 or trading standards.
"Friends, neighbours and members of the Neighbourhood Watch schemes can always help you choose the right person for the right job.
"Do not accept a price that seems to be too good to be true. Nine times out of ten it will be."
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