Europol is providing security tips for the public, to be found on their twitter account, recently for instance:

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#BuySafePaySafe tip: Use a #creditcard when shopping online 💳 Most credit cards have a strong customer protection policy. If you don’t get what you ordered, the card issuer will refund you 👍 pic.twitter.com/uvFRMs66da

— Europol (@Europol) 19 juni2018

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Protect yourself from holiday fraud! 🌴✈This happens when you pay for rental services offered online & find out that the service you booked:
– Doesn’t exist
– Was paid with a compromised card of another victim, making your purchase invalid
See how ➡https://t.co/FqcRp2o8rb pic.twitter.com/RnkCkT0PPb

— Europol (@Europol) 12 juni2018

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Protect yourself from #fraud scams targeting employees! Here is what you can do👇 pic.twitter.com/UzQJxTlsTw

— Europol (@Europol) 8 juni2018

Further they have a section on their website with guidance:
Europol Public awareness and prevention guides