"I got phoned up by the bank, told something dodgy had gone on with my account, and a week later £70,000 - all my savings - had gone," the former Blue Peter star told host Lorraine Kelly.
Kelly looked stunned, gasping: "'£70,000? Jesus..."
Skelton, 36, told her: "All gone.
"And it was just a few questions over the phone."
Prime Minster David Cameron (left) meets with former England Rugby Union player Josh Lewsey (right), TV presenter Helen Skelton (second right) and comedians John Bishop (centre) and David Walliams (second left) at 10 Downing Street in London.
(L_R) Miranda Hart, Helen Skelton, Sarah Brown, Gordon Brown, Christine Bleakley, Lawrence Dallaglio, Fearne Cotton, and Jimmy Carr at No10 Downing Street to meet Prime Minister Gordon Brown as part of Sport Relief 2010, Downing St, Westminster, London.
Countryfile presenter Helen Skelton speaking on the opening day of BBC Countryfile Live at Blenheim Palace near Woodstock, Oxfordshire. (Photo by Steve Parsons/PA Images via Getty Images)
Embargoed to 0001 Tuesday March 23 Blue Peter present Helen Skelton celebrates the success of the programme's 48th Annual Appeal in Wandsworth. London.
Blue Peter presenter Helen Skelton, arrives for The British Inspiration Awards, at The Brewery in London.
Helen Skelton attends the National Lottery Awards at the Roundhouse in central London.
Helen Skelton performing the 'Time of My Life' routine from Dirty Dancing with the cast of the musical, during the BBC Children In Need Appeal 2010, at BBC Television Centre, Wood Lane, London.
Helen Skelton is congratulated after walking on a tightrope between two of the chimneys at Battersea Power Station, London.
Helen Skelton celebrates after walking on a tightrope between two of the chimneys at Battersea Power Station, London.
Helen Skelton arriving at the British Academy Children's Awards 2011, The Hilton Hotel, London.
Helen Skelton arriving for the 2012 Arqiva British Academy Television Awards at the Royal Festival Hall, London
(Left to right) Presenter Helen Skelton's dress catches the wind as Great Britain's Sarah Storey and Sir Chris Hoy take part in the Olympic and Paralympic Athletes Parade in central London.
Helen Skelton with medal at the finishing line of the Virgin Money London Marathon on the Mall in London.
LONDON, UNITED KINGDOM - 2019/04/28: Helen Skelton and Cel Spellman at the Virgin Money London Marathon 2019. (Photo by Brett Cove/SOPA Images/LightRocket via Getty Images)
LONDON, ENGLAND - APRIL 28: (L-R) Helen Skelton and Kirsty Gallacher during the Virgin London Marathon 2019 on April 28, 2019 in London, United Kingdom. (Photo by Jeff Spicer/Getty Images)
Presenter Helen Skelton during the rehearsals for BBC's Blue Peter's world record attempt at Mattress Toppling.
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Shelton said she is now making an ITV programme about such scams to help people protect themselves.
She said: "It happens every day of the week, to all members...
"We are not talking about little old ladies who are victims who don't understand the internet.