Alex drives a car without a front license plate while in Italy- something that is not legal there.
At one point a close-up of Paola's iPhone can be seen as she texts Mitch, which reveals that she has the ApplePay app. However, this should not be the case as Paola is Italian and that particular app is not available in Italy.
The road Mitch is driving on is supposed to be in Italy but is clearly in the US as it sports yellow (instead of white) divider lines in the middle of the road.
When Alex is lying on her back on the floor, Mitch asks her if it's okay if he joins her "in a prone position". The correct term for the way Alex is lying is actually supine- prone refers to lying on one's stomach.