Losses from bank transfer fraud soared to £456m last year, despite dozens of banks signing up to a code to protect their customers from these type of scams.
Which? estimates £320m lost to fraud could have been prevented with the long-overdue system, but some customers remain unprotected.
Which? investigates how someone lost £2,500 to fraudsters through a Google advert posing as digital bank Revolut.
Scams are now the biggest problem for landline users, with criminals using cheap technology to exploit millions of people. Find out what tactics they use.
Which? Money has found the way banks treat fraud victims continues to be a lottery, despite the introduction of new industry standards.
It's the ninth bank to sign up to the code to protect customers from bank transfer scams. But as many as 10 banks are still dragging their heels.
Find out which banks made our Recommended Provider list, from high street stalwarts to phone-based and app-based challenger brands.
Banks have failed to reach an agreement on how scam victims are repaid their lost money - find out what this means for future compensation claims
Call for victims who have lost thousands of pounds by transferring money to a fraudster since 2016 to be paid back by their bank.
Fraudsters stole more than £208m through bank transfer scams in the first half of 2019 - and only a fraction was ever returned to victims.