Possible "Can you hear me?" phone scam

Authorities in the US have warned the public to avoid answering if they receive a phone call from an unknown number that when picked up is someone asking: "Can you hear me?"

The authorities have issued the warning due to fears the calls are from fraudsters trying to trick people into saying "yes" so they can record this and use it to authorise fraudulent charges to the victim's phone or credit card bill.

If they are correct, it is the first scam to target automated phone services with which users are required to answer "yes" or "no" to questions in order to access their accounts.

There have so far been no reports of calls of this kind being made to UK consumers. However, scams spread quickly - especially if they are seen to be working.

So it is sensible to be on your guard in case fraudsters operating in the UK start using the same tactics.

Susan Grant, director of consumer protection for the Consumer Federation of America, is urging the public to simply put the phone down to unsolicited callers who pose that question.

"I know that people think it's impolite to hang up, but it's a good strategy," she said.

I've been defrauded. What should I do?

It is a good idea to contact your bank, phone company or card provider as soon as possible if you suspect you may have compromised your account.

You can also report scams of any kind to Action Fraud on 0300 123 2040.