Online retailers have to find a way to process returned merchandise just like their brick-and-mortar cousins. But there are some wrinkles that come with managing reverse logistics for an e-commerce operation. Returned products are often unused, and companies may have to handle an array of merchandise. "How you handle [returned items] depends on whether it is coming back through a storefront or through e-commerce," said David Vehec of Genco. "When you combine the two, that's where the complexity increases."