Factual error: In a scene where Kat is flying to or from Northern California for college, in the background through the window on the plane one can see a commercial jet which has the winglets of a narrow-body Boeing, which were not introduced until 1998 on the Boeing 737 NextGen, rather than "wingtip fences" of an Airbus which were in use as early as 1985. Eve disappeared in 1988 when Kat was 17, so this would have been 1993 at the latest, when Kat would have been expected to have graduated from Berkeley. In the movie, it is suggested that this was just 2 years after her mother disappeared, so this would have been not later than 1990-91.
Factual error: After the introduction, there's a scene supposedly happening near Lausanne on the Lake Geneva, but in fact it's altogether the wrong canton, Ticino and most likely Laggio Majore, a couple of hundred kilometers away. (00:06:00)
Factual error: When they torch the car by the docks, supposed to be about 15 years in the past, there is a US Navy Independence-class ship in the background, but the first of these was only launched in 2008, at least 9 years after the scene was supposed to depict. (00:35:00)
Factual error: Ryan Reynolds has an entire trailer of evergreen trees that he is going to plant in the middle of the winter. No landscaper would plant trees at this time because the ground is frozen, and if planted they would die.