Continuity mistake: In the scene where the police car is chasing Ben Affleck and Uma Thurman on a bike down in a tunnel, in one shot, the police car's flashing light on top is ripped off by the low ceiling. In the very next shot, the lights are still on the top. The next shot shows the lights are gone. (01:13:50)
Continuity mistake: Towards the end of the movie, when Michael and Rachel split up between the glass door, her left hand is cut and bloody, then it is not, then it is again, as it is pressed against the glass. (01:37:35)
Revealing mistake: In one of the shots of a newspaper you see a serious grammatical error for a headline. The use of "it's" instead of "its". It was something to the effect of "Ahead of it's Time". Forgivable for a note left by a character, but a mistake that real newspapers just don't make. Just FYI: The actual headline is "Nexim Announces It's Answer to ARC's Living Display". (00:11:40)
Answer: He could have got someone to obtain the key and bring it to him. The same goes for much of the other stuff in the envelope.
Xofer