Factual error: After Mat has turned off his ringer we see him going into the menu and turning off his voice mail through an option labeled "Voice Mail / Off". The biggest problem with this is that there is no option to turn off your voice mail in an I90. The closest thing that it has is an option to turn off the ring tone that signals a new voice mail message.
Factual error: Denzel Washington, pretending to be Paul Cabot goes to his hotel and says he forgot his key and he would like a new one. He wasn't asked for an ID nor did he presented any so it's unlikely the clerk just gave him the key. Moreover, he said he forgot his key inside the room, so without ID what would have normally happened was another employee would go up with him and open his door for him.
Factual error: Ann could not have changed the beneficiary of her life insurance policy into Mathias' name. In the case of a married couple, the law requires a spouse's signature to surrender benefits whenever somebody other than the spouse is named as the primary beneficiary.
Factual error: In the scene where Denzel Washington pretends to make the phone call to the flower shop on his cell phone, right before he hangs up, the phone says "If you'd like to make a call please hang up..." revealing to the audience that he was talking to himself, not a person on the phone. But cell phones do not make that announcement, only regular phones.