Asda customers have been warned about a scam.

In recent months, shoppers have been lured by fraudsters offering to give them £1,000 gift cards.

These competitions may look legitimate when they spring up on Whatsapp or Facebook – but they’re actually just scams to get your personal details.

Posting on Twitter, Action Fraud wrote: "We have received over 97 reports about these FAKE Asda emails offering the chance to win a £1,000 gift card."

"If you have been sent an email which you’re not quite sure about, forward it to the Suspicious Email Reporting Service (SERS): [email protected] "

Cyber expert Andy Heather, from anti-fraud website Centrify, spoke to the Mirror about how dangerous these scams can be – and why you should always be vigilant online.

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He said: "With the majority of people still working from home or on furlough due to the Covid-19 crisis, we’re seeing a sharp rise in online scams offering everything from gift cards to discounts on everyday essentials.

"Failure to identify and avoid these scams could cause a serious security headache for consumers, especially if they are using company-owned laptops and mobile devices and inadvertently putting their employer at risk of fraud.

"All it takes is for a hacker to get hold of a username and password and within minutes they will be able to access email accounts and impersonate workers in an effort to commit widespread fraud, so it’s vital companies invest in the latest cyber security systems to ensure fraudsters are locked out of the business at all times."