(at around 14 mins) When "Abigail" is speaking with the bank manager about closing her account he asks her what her passcode is. For security purposes no bank employee would never ask someone to tell them what their passcode is (even if they are closing the account) since they could then use it themselves. They would ask them to enter it on a keypad with it showing up hidden on the screen.
On the bank's edifice near the end we see the supposed Latin motto "Viras veritas obses." Viras is not a Latin word. The filmmakers may have intended "Vis veritas obses" which translates to "Truth (is) the hostage of force."
One of the cops says that Abigail doesn't have a social security number, but you need a social security number to file taxes or own a bank account.
When the news in the TV tell about Abigails story and how she disappeared 17 years ago, they use the same clip twice, before and after the news clip.
Abigail is suffering from agoraphobia. People with such nervous suffering don't just walk out of their apartment and into a crowded bank.
Not exactly a goof, but it seems unlikely that a woman who lived as a recluse for 20 years would not have the most recent fashions or know how to use a computer.