Bredbandsbolaget, which is a subsidiary of Norway’s Telenor, wanted to persuade its customers to download free music, and sent advertising material to 380,000 customers in an open letter. But the username and password was inadvertently printed on the letter too.
“The mailing should have been sent out in a sealed envelope.”
Since the letter looked like most other direct marketing that’s stuffed through Swedish letterboxes on a daily basis, many customers simply threw it away without looking at it.
Now Bredbandsbolaget has written to all its customers asking them to change their password.
Customers who, for the sake of convenience, use the same password elsewhere – which is likely to be the majority – are being advised to change all such passwords.
“If anyone suffers loss as a consequence of this mistake, we would like them to contact us so we can discuss the matter,” said Anna Thorbjörnsson.