This type of "friendly fraud" might feel harmless and seem like a small drop in the bucket for powerful corporations. But taken together with more nefarious forms of fraud, it's costing retailers more than $100 billion per year, according to Riskified , which published a new study on the problem on Thursday. Riskified uses artificial intelligence and automation to fight fraud and boost revenue at major retailers including Wayfair , Peloton , Revolve and Canada Goose . For the study, it surveyed over 300 global companies with more than $500 million in total annual revenue. The firm found retail policy abuses, such as return fraud and using fake email addresses for promo codes, is rising for some retailers.

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Persons: Robert, there's, they've, Eido Gal, Gal Organizations: Hulu, CNBC Locations: Long, , New York