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Banders are encouraged to analyze and publish the results of their banding activities. However, data on "Report-to-bander" listings may be erroneous, because not all encounters are checked for authenticity. Therefore, before unusual records are published, they should be verified. Also, any suspicious data should be reported whether it is to be used or not. In the U.S., it is necessary to send both the BAND NUMBER and the BATCH NUMBER (or permit number and cycle processed if no batch number is given) to the Bird Banding Laboratory so that the source documents (the banding schedule, and the encounter letter) can be located and examined.