Martin Lewis returned to This Morning to take questions from people looking for advice from the finance expert.
In the final call of the segment, the discussion moved onto scams after a viewer got in touch to say the bank had refused to refund her when she was swindled
Host Eamonn Holmes said he had today received a suspicious looking message from a number claiming to be Royal Mail.
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He said: "I got a text this morning from the Royal Mail. It says your package will be held and not be delivered due to a £1.99 unpaid shipping fee."
Martin Lewis provided advice on what to do if you receive this very "well-known" scam.
He said: "It's not just Royal Mail. It's DPD and another delivery companies.
"When they get in touch with that charge, you're gonna give them your bank details and it's a root into scamming you.
"Unless you are sure you have ordered a parcel and it is coming from that company you do not touch those texts if you are asked to pay. Absolutely delete it."
The Money Saving Expert also warned viewers that the usual method of stopping companies from sending you repeat messages can backfire with scammers.
He said: "If you get a message from a legitimate company and you want them to stop contacting you, you can send STOP and that's the right thing to do.
"But if you get a message from an illegitimate company, texting back STOP tells them that you are a real phone number and now they know that there's a person there so just delete it."
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