Blue Peter badge holders won't be allowed to get into visitor attractions for free for the time being after some badges were offered for sale online.
The programme has decided to suspend the deal while it comes up with a way to ensure that people with badges are the rightful winners of them.
More than £100 has been bid for some badges. People want them because they get you free entry to 200 places.
A BP spokesman said: "This is a sad but necessary short term step."
Types of BP badges
Blue: For interesting letters, good ideas, stories, poems, pictures and for having appeared on the programme
Silver: For doing something different from what you did to win your blue badge. If you won a blue for a letter, you could win a silver for a picture or poem
Green: For letters and pictures with a conservation theme
Gold: For outstanding achievements - like saving somebody's life
Competition: For winners of BP competitions
He said the programme had a responsibility to both badge holders and to the places which offer free entry.
"We think BP viewers will agree that this is the best way forward to making the whole system less open to abuse.
"We are doing our best to get the system back up and running as soon as possible."
Blue Peter has been handing out the badges for nearly 50 years.
A variety of badges are available and they are presented for everything from good letter-writing to heroic acts.