Nearly ten percent of the reports to the Consumer Agency last year concerned telephone sales, with a "clear overrepresentation" of consumers over 65 years old.
In the wake of the scandal surrounding S-lottery's methods, it is high time for powerful measures against an industry that is a constant concern from a consumer perspective, according to Tisell.
"Reports of telephone sales often involve misleading and aggressive marketing rather than reports related to other marketing channels", she writes.
Agreements concerning complex products that can also have significant and long-term impact on household finances are unsuitable for decision-making over the phone, according to the Director-General.
Therefore, she says, it is time to "seriously consider a ban on telephone sales of credits and an opt-in system, where companies are only allowed to contact consumers who have consented to it".