For most retailers, December is the most profitable season of the year. However, customer returns in January can cut deeply into December revenues — particularly if the returns are fraudulent. U.S. retailers suffer annual losses of $18.4 billion from fraudulent returns, according to data analytics company Appriss and the National Retail Federation (NRF). And as antifraud technology company Signifyd has found, the pandemic is encouraging higher retail return rates — as much as 80% higher than before COVID-19 hit. Such a shift is likely to mean even more fraud. Old dog, new tricks Return fraud isn’t new. Dishonest customers have long “returned” items they stole or purchased elsewhere for less to stores willing to issue full cash refunds. But growth in online sales has magnified return fraud...