Etickets are great in the revenue travel industry. When it comes to non reving I prefer paper tickets. While non reving things can quickly become complicated when you hold an eticket for e.g AA from JFK to FRA and now want to use it on a LH flight, since you were bumped from AA, and LH leaves in 45min. Since LH likely will not be able get hold of the eticket they will refuse you. With a paper ticket you are less likely to run into such troubles.
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