After the car accident on the highway, the grill is back to normal on the Ford that Sandy is driving. Prior to the accident, the grill is dented and damaged.
When Julian and Marisol are put into the trunk of their car at gun point, they were clearly driving a Dodge Charger, however the shot of them in the trunk was taken from a Ford Crown Victoria. This happens again when they are removed from the trunk by the police after the car chase. There is also a number '9' decal visible under the vinyl wrap on the trunk lid. This would indicate that they used one of the cop cars to film the shots.
When Sandy is following Diana down the highway, there is a quick glimpse of the speedometer of her car as she accelerates. The car says it is "Tue 23 Feb." However, based on the photo IDs, Sandy's birth date is 18 May 1974. The movie takes place in May just after his birthday, based on his family celebrating his birthday near the beginning of the movie.
When Sandy is talking on his cell phone with the credit card company, there is no rear view mirror. When he is pulled over and taken out of the car, there is now a rear view mirror.
When Sandy stops for gas and sees his card has been declined he is at pump 8. When he goes in to speak with the clerk he says he is on pump 5.
The movie turns on the premise that the crook needs to "be standing right here" to make an arrest, as a police officer tells Bateman's character. Bateman lives in Colorado, while McCarthy's character is making the false charges in Florida. Not so. "If the perpetrator is found, they are usually arrested in the area in which they live, and all local, state and federal documentation is sent to that court system," said Raul Vargas, a fraud specialist with Identity Theft 911. "Keep in mind, jurisdiction is based upon the area in which the crime occurred, not the area in which the victim lives.
While the police have photo evidence of Diana. In reality, they would never send the real Sandy Patterson on a citizen vigilante hunt. The Florida police or the FBI would've arrested Diana on the spot.
Spelling Error. When they access the statement of Harold Cornish to make a fake credit card it has the heading of Business Travel and underneath that is Hotel Accomidations when it should say Accomodations.
Crime bosses would never run their enterprise or even so much as use a cell phone in prison.
When pumping gas in St. Louis, Sandy uses the green handled nozzle which is for pumping diesel fuel. That is true for most gas pumps, however there are some gas stations that use a green handled nozzle for regular gasoline, BP being one of them. Also, there are some cars that use diesel fuel as opposed to regular unleaded gasoline so the car they were driving could have been one of those.
When the real Sandy is driving to Colorado with Diana. He swerves the car to bang her head against the passenger door, twice. The camera tries to move to make it look like a swerve but the background behind the car does not change the motion.
When Sandy is pumping gas in St. Louis the gas pump's readout never moves from "$0.00" and "0.000 gallons"
After the car accident on the highway, the grill is back to normal on the Ford that Sandy is driving. Prior to the accident, the grill is dented and damaged.
When Sandy is sitting in the crashed car with the drivers identified tire hanging off, a jack can be seen under the the car keeping the car propped up.
In the scenes set in Denver (stopped by police/gas station) and St. Louis (police car escape/foot chase), distinctive Atlanta landmarks and buildings are visible (Philips Arena, Georgia Dome, Federal Building).
When Sandy and Diana pull over at the underpass in Florida, overhead signs for Georgia highways are present on the over-passing highway. These same signs are also seen during the car chase with the skiptracer.
When Sandy and Diana are in a car accident together on the highway, the real Sandy asks to see her driver license. The ZIP Code on the license is actually for Huntsville, Alabama.
As Sandy arrives in Winter Park, Florida, a flying shot of a beach in front of the town with an unknown skyline is shown. Winter Park is a small bedroom community just north of Orlando and it's completely landlocked with the exception of a few local lakes. The closest beach to Winter Park are approximately fifty minutes away.
With photo evidence of Diana, in reality the police would never have sent the real Sandy Patterson on a citizen vigilante to hunt down the criminal.
Diana's description of The Fountainhead by Ayn Rand, includes some details which come from another Rand opus, Atlas Shrugged.