When passenger requested to make any changes in their tickets them agent need to make reissue in their tickets with the requested changed in routing, Travel dates change, Class of booking or any another request.
Full reissue – When passenger requested the changes before using any portion of journey.
Part reissue – When passenger requested to change after using their 1st portion (O/B) of journey.
There are few points which we missed while processing reissue or exchange and then that transactions results in an ADM. Below are those points and the way to reduce those ADMs.