Embodiments consistent with the present invention relate to methods and systems for verifying data of an application system. Consistent with exemplary embodiments, such methods and systems may send a message including data copied from a first data set processed by a first processing component and then store outbound messaging data describing the sent message. A second processing component may receive the sent message and store inbound messaging data describing the received message. The methods and systems may then verify a consistency of the data of the first and second processing components according to a comparison of the outbound and inbound messaging data.