We usually recommend doing additional research on websites that do not have licenses and avoid mentioning their owners. This does not automatically lead to non-trustworthy sites but the due diligence won’t hurt.
Also, even SGA and MGA-licensed sites may turn out to be a scam. The proper indicator of an online operator to avoid is its reputation. If registered members on the gambling forums complain a lot about delayed payouts, fishy bonus T&C, or even raise issues about non-paid wins, it is a good sign to reconsider registering and to look for other platforms. Luckily, the selection is huge. Our database alone features 500+ Sweden-friendly gambling destinations.