Mistaken (2008)

Destitute divorcee Nellie discovers someone who stole her maiden identity has been plundering her accounts. Determined to set things right, she enlists the aid of a bank official to track the fraudster down, but when she encounters the other 'Eleanor Kendall' in Montreal, she discovers her adversary is a charismatic single mother. As she plots her next move, Nellie begins to form an unlikely friendship with 'Eleanor', but when the truth finally catches up with the pair, it proves to be more perilous than anyone could have imagined. Thriller, starring Lana Parrilla and Bénédicte Décary.