Sweden’s gambling regulator has publicly warned all its new online licensees that they need to comply with the new rules or else.

On Tuesday, Sweden’s Spelinspektionen regulatory body (formerly Lotteriinspektionen) made public a strongly worded letter it sent to the 66 companies approved to operate under the country’s new gambling regulations, which took effect on January 1.

The letter said Spelinspektionen had received “many complaints and tips on deficiencies in gaming companies in several different areas.” Chief among these faults is some licensees’ failure to check customers’ names against the new Spelpaus self-exclusion register before (a) permitting them to gamble, or (b) sending them promotional material inviting them to gamble.

Spelinspektionen also reminded its licensees that their websites need to prominently feature the Spelpaus logo (along with the regulator’s other two responsible gambling features) and ensure its link to the program is active. Any operator whose website has yet to institute these requirements needs to take action “immediately” or face the consequences.