The card trick in the opening sequence is authentic. There is no editing. It is what is known as a "card force", wherein the magician makes the unsuspecting audience member pick a predetermined card. The audience member believes they have picked a random card, which is reinforced by the magician re-shuffling the deck several times, though this is just misdirection.
Isla Fisher has explained in interviews that her character Henley is "germaphobic", which is why she is seen wearing gloves throughout the movie.
The final scene was filmed on the Pont des Arts in Paris, France, which, as shown in this movie, was famous for having an estimated one million "love locks" attached to its railings. However, on June 1, 2015, city council workmen started to remove the padlocks following years of complaints from locals.
In the J. Daniel Atlas practice sequence near the start of the movie, we see the hands of Dan or Dave Buck digitally composited with Jesse Eisenberg's face. These twin brothers are acclaimed sleight of hand artists, as well as pioneers in the art of cardistry. Their skills can be seen in Smokin' Aces (2006), and LazyTown (2002) as well. Cardistry is an open display of skill with cards, similar to juggling. The sequence of moves performed in this movie, is called "Pandora", and, at the time of filming, it was considered one of the most difficult moves in cardistry.
In the scene before J. Daniel Atlas (Jesse Eisenberg) and Merritt McKinney (Woody Harrelson) enter the secret room, McKinney tells Atlas that he is a "bit of a control freak", to which Atlas replies "Have we met before?" This is a nod to a previous movie in which Woody Harrelson and Jesse Eisenberg had appeared, Benvenuti a Zombieland (2009).