A method of operating a video system to detect fraudulent return transactions comprises receiving an indication of a return transaction from a point of sale system, wherein the indication of the return transaction indicates a time when the return transaction occurred. The method further comprises receiving video data of an area proximate to the point of sale system captured at the time when the return transaction occurred. The method further comprises processing the video data to determine whether a first person is located in a return area and whether a second person is located proximate to the point of sale system. The method further comprises determining whether the return transaction is legitimate or fraudulent based on whether the first person is located in the return area and whether the second person is located proximate to the point of sale system.