An anonymous reader writes: At Best Buy, returning too many items within a short time can hurt a person’s score, as can returning high-theft items such as digital cameras. Every time shoppers returns purchases to Best Buy, they are tracked by a company which has the power to override the store’s touted policy and refuse to refund their money. That is because the electronics giant is one of several chains that have hired a service called The Retail Equation to score customers’ shopping behavior and impose limits on the amount of merchandise they can return. Stores have long used generous return guidelines to lure more customers, but such policies also invite abuse. Retailers estimate 11% of their sales are returned, and of those, 11% are likely fraudulent returns, according to a 2017 survey of 63 retailers by the National Retail Federation. Return fraud or abuse occurs when customers exploit the return process, such as requesting a refund for items they have used, stolen or bought somewhere else. Amazon.com Inc. and other online players that have made it easy to return items have changed consumer expectations, adding pressure on brick-and-mortar chains. Some retailers monitor return fraud in-house, but Best Buy and others pay The Retail Equation to track and score each customer’s return behavior for both in-store and online purchases. The service also works with Home Depot, J.C. Penney, Sephora and Victoria’s Secret. Some retailers use the system only to assess returns made without a receipt. Best Buy uses The Retail Equation to assess all returns, even those made with a receipt.