An interaction security system for user verification utilizes co-location in order to more accurately identify a user location. The system identifies a user computer system location based a location determination component for the user computer systems. Moreover, the system identifies a resource accessory location of a resource accessory. The resource accessory location may be determined in a number of different ways, including, but not limited to, a location determination component of the resource accessory. The system may utilize a time requirement and/or a geo-location requirement in order to maintain verification of the user for a period of time and/or within a specific location. Moreover, the system may require the user to take an action with respect to the resource accessory before verifying the user location for an interaction.