This whole endorsement stuff is ridiculous indeed, but it occasionally seems to happen; I remember having it read here in the past, concering a different airline.

FWIW, what is it they want to see happen then? And who needs to do it?

As a general rule, I think it's a good idea not to have a specific airline mentioned on the ticket, it avoids problems.
I don't know if all airlines are as willing as my airline, but our staff travel office always issues tickets without airline, flightnumber, or date and often show just a 'vague' destination (NEW YORK iso JFK or EWR, LONDON iso LGW or LHR): it avoids running into problems with overly zealous gate agents...