The coupons promise a free £250 voucher in exchange for clicking on a link and providing personal details.

They have been widely spread on Twitter, WhatsApp, Facebook and email.

However, Aldi has confirmed it is not running any such promotion.

An Aldi spokesperson said: “The vouchers being circulated online are fraudulent. We advise customers to ignore these adverts and not to share any personal information.”

The Covid-19 pandemic has led to a huge surge in scam activity as criminals seek to exploit people during a time of heightened vulnerability.

Tactics include sending fake emails from HMRC offering tax rebates, social media quizzes requesting personal data, and doorstep criminals pretending to be healthcare professionals offering bogus coronavirus testing services.

If you have been a victim of fraud, you can report it to Action Fraud using its online reporting tool.