Generally speaking, since LH engaged in destructive telekenesis.......................in 2013 or so, it is almost never a good idea to credit TK flights to M&M or viceversa. Furthermore if your fares were high enough and frequent enough to make it make sense, then you probably would not be needing to ask the question (not a swipe at you, but just the way that LH and TK have set it up). As mentioned above, LH subsidiaries such as Euro, Edel, etc credit nowhere but LH.