Originally Posted by
TheAirman
It's a pure UA itenary, but it seems that I am blind.
I go to: View my itineraries
There I can see:
- Held itineraries
- Current itineraries
Under "Current itineraries" I see the iten. in question. But I don't see any "eticket receipt button" neither in this overview nor when clicking on "view/modify iten.".

Hmm, below the "view/modify iten." link there should be a "e-receipt" link.
For me, since I have to use a corp. travel agent, the only time there is no "e-receipt" link is when the tickets have not yet been purchased. I certainly hope there is another explanation in your case.