Martin Lewis has warned of a "clever" new scam that sees criminals "getting your bank account details".
The financial guru took to social media to warn his followers of fraudsters contacting people pretending to be the Post Office.
These criminals tell victims that they have a parcel for them and will not deliver it until they pay a fee by inputting their bank details.
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Posting on his Twitter account, Lewis wrote: "Beware. Just had a clever version of the 'pay £1.99 for Post Office Parcel delivery' scam text, aiming to steal bank info.
"The 'fee' isn't mentioned in the text, it talks about "delays in transit" and offers "a date to reschedule".
"It's only when you click thru it mentions a fee."
Since being posted, the tweet has been liked over 800 times, and has received dozens of replies from other Twitter uses sharing their experiences with the scam.
One said: "I went along with 1 of these. Put in a load of nonsense, which it just ignored. It is only interested in getting your bank account details."
A second shared: "I got this - off my guard at the end of a long day at work. Thankfully clocked it before I’d put card details in, but I immediately got a second scam text pretending to be from my bank.
"So even if you realise, they’ve got a plan to try and scam you a second time as you panic!"