I'm new to this forum. I found it's members are very informative and helpful. For this reason I make my mind to post my query here. I'm holding 2 passports. Both of them from my motherland. One is before married with my Father's name as last name which I submitted for stamping immigration visa. As in all of my educational and professional certificate and all I used my Father's name as last name but after marriage I made another passport with my husband's name as last name and this passport contains 5 years multiple entry USA tourist visa. Now my query is Can I go to New York from Toronto with another passport ? In a nut shell can I use that post marriage passport if I intend to visit USA from Canada? Can anyone enlighten me about this matter please?