Thus, the host lensing parameters and the fact that the event was caused by microlensing do not rely on the data other than the anomaly. We note that sources other than planets can cause anomalies in microlensing events, see, e.g., @gould13a for MOA-2010-BLG-523. @yee12 showed that the planet MOA-2011-BLG-293Lb would have been discovered in survey-only data, if photometry from OGLE-IV, MOA-II, and Wise Observatory were routinely combined and analyzed jointly for all microlensing events. However, this still has not been implemented. The currently operating and future surveys have greatly increased the number of events discovered; hence, the follow-up groups are unable to cover all the ongoing events. Also, the cadence of survey observations increased. The consequence of these is an increase in the number of planetary detections in survey-only data. At this point, the questions about the reliability of detections and the accuracy of parameters found in survey-only data arises [@yee12].

Here we present the detection of a planetary system in the microlensing event OGLE-2012-BLG-0406. We use the data collected by the OGLE survey only. The planet turned out to be a super-Jupiter orbiting a star that is an M or K dwarf. The projected separation places the planet well 