Overview. Please confirm whether or not you need to apply for a visa. You may not need to apply for a new U.S. visa if you already hold a valid U.S. visa of the classification appropriate to your purpose of travel, or hold a passport eligible for travel under the Visa Waiver Program, or if you hold a Canadian passport.tep 6. Following your visit to the Visa Application Centre to have your photo and fingerprints taken, you will then visit the U.S. Embassy or Consulate on the date and time of your visa interview. You will need to bring: 1  A printed copy of your appointment confirmation letter,