It observed 50 profiles, pages and companies on Facebook, Twitter and Instagram imparting stolen credit-card details, and Netflix and Uber Eats accounts.
And a great deal of the content material had remained on the structures after being reported.
Facebook and Twitter stated such pastime used to be no longer tolerated and would be removed.
The investigation, carried out earlier than the coronavirus lockdown, located one Facebook publish revealing a Yorkshire man's:
full name
date of birth
address
mobile cellphone number
credit-card number, protection code and expiry data
bank identify and type code
According to Which?, the put up had been stay for 4 months.
Which? stated it had stated it to Facebook however the socialcommunity had refused to dispose of it due to the fact it did no longer breach its neighborhood standards.
Only after Which? had requested a assessment of that choice had the
submit been eliminated - and, even then, the crew in which it had been posted had remained active.
In response, Facebook, which additionally owns Instagram, it had now acted to take down all the content.
"Fraudulent endeavor is no longer tolerated on our systems and we have eliminated the agencies and profiles flagged to us through Which?... for violating our policies."
"We proceed to make investments in humans and technological know-how to perceive and get rid of fraudulent content material and we urge humans to record any suspicious content material to us so we can take action."
Scam tactics
On Twitter, investigators determined fraudsters offering:
the full credit-card small print of any person with a "£13,000 plus balance" for £100 - or three units of card small print for £200
a pretend passport for £3,000
Which? stated it had observed the content material without a doubt via looking out for slang phrases for fraud.
And Twitter's algorithms had then even cautioned comparable debts with the aid of its "Who to follow" section.
Twitter stated it used to be towards its regulations "to use rip-off procedures to gain cash or non-public monetary information".
"Where we become
aware of violations of our rules, we take strong enforcement action," it
said.
"We're continuously adapting to awful actors' evolving strategies and will continue to iterate and enhance upon our polices as the enterprise evolves."
All debts furnished to it through Which? have now been suspended.
Which? Money editor Jenny Ross said: "It's spectacular that social media websites make it so convenient for criminals to exchange people's non-public and economic information, mainly as fraud is such a customary crime that can have devastating consequences."
She known as on Facebook
and Twitter "to take greater
motion to forestall their websites turning into a secure haven for scammers"
and "work with the economic enterprise and police to tackle serious flaws
with their platforms".
"We're continuously adapting to awful actors' evolving strategies and will continue to iterate and enhance upon our polices as the enterprise evolves."
All debts furnished to it through Which? have now been suspended.
Which? Money editor Jenny Ross said: "It's spectacular that social media websites make it so convenient for criminals to exchange people's non-public and economic information, mainly as fraud is such a customary crime that can have devastating consequences."
