Applying for an H-1B Visa

• An entry visa is a sticker placed in your passport, which you obtain from a U.S. consulate outside the United States. In most cases, visa renewals are not possible inside the United States. You are allowed to remain in the U.S. once you have been admitted, even if your entry visa expires, as long as your I-797 Approval Notice and Form I-94 remain valid and are in the right visa classification. (See this description of documents.)
• Canadian citizens are exempt from the entry visa requirement.
• You should bring all documents required for entry to the U.S. to your visa appointment. Additional requirements may vary by consulate.
• Visit the U.S. State Department website for links to U.S. Consulates around the world. Check visa wait times on the Department of State website.
• Applicants will need to pay a visa application fee. Some countries also require applicants to pay a reciprocity fee.
• In most cases, you must apply for a visa in your country of residence or nationality. See the State Department website for details on this policy. 
• If possible, schedule an appointment before you depart the U.S. Schedule your visa appointment for as soon as possible after you arrive in the country where you will be applying. This will minimize the chance of delays in returning to the U.S., if the visa process takes longer than expected.
• Consulates may delay issuance of your visa for security reasons; see more information on preparing for a possible background security check.
• Once your visa is issued, verify it for accuracy. Also check the number of Entries permitted (M = multiple), and Expiration Date. The State Department Visa Reciprocity table explains the typical number of entries and validity period for each country / visa type.

Automatic Visa Revalidation for Travel to Canada and Mexico

U.S. immigration regulations allow nonimmigrants to re-enter the United States from Canada and Mexico with an expired visa under the following conditions:

• Your stay in Canada or Mexico is less than 30 days.
• You are not a citizen of Iran, Sudan, or Syria.
• You do NOT apply for a new entry visa at a U.S. consulate during your stay
• You have all of the documents required for entry to the U.S. (excluding the entry visa.)
• You have an unexpired Form I-94 (i.e. paper I-94 card, or printed copy of electronic I-94)
• You have maintained and intend to resume nonimmigrant status.
• This benefit also applies to nonimmigrants who have changed status in the United States, whose visa is still in the category in which they had entered the United States. In that case, the visa is considered "converted" to the proper visa category as well as "extended" to allow re-entry.

• If you have ever had a visa canceled, you are not eligible for Automatic Visa Revalidation.