CON men are preying on older, vulnerable residents.

Middlewich Police are warning the elderly to be wary of fraudsters knocking on doors trying to dupe people out of money during the past week.

A police spokesman said: "Elderly members of our local society have been receiving cold calls advising to have their windows tested. When challenged or told they’ll make a family member or friend aware, the caller becomes aggressive and states no one else is needed to be present.

"Thus far, no money has been handed over but we’re unsure how many have received such calls other than the ones we’ve been made aware of."

Residents are warned to be on their guard and never to trust anyone they do not know who cold calls them at home or tries to befriend them.

No matter how long you've been speaking to someone online, never send them any money, allow them to access your bank account, transfer money on their behalf or take out a loan for them.

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Always be wary and refuse if you are are asked to provide copies of your personal documents such as passports or driving licences, invest you money on their behalf or buy or the codes on gift cards from Amazon or iTunes.

Never send or receive parcels on behalf of a stranger.

Anyone who suspects they may have been a victim of a scam should not feel ashamed or embarrassed as you are not alone. Contact your bank immediately and report it to Action Fraud on 0300 123 2040.