90-day period The Visa Waiver Program (VWP) allows most residents or nationals of participating countries (*) to visit the United States for vacation or business for stays of 90 days or less without a visa. If you qualify, you will be notified by US Customs and Border Protection (CBP) when the application process is complete.
If you are denied a visa because you do not have a valid reason to enter the United States, you may be able to reapply under the VWP. To be eligible for consideration, you must provide evidence of having been granted a passport by one of the VWP countries. You should apply for your new passport as soon as possible after being declined a visa.
In addition to the 90-day limit, people who want to remain in the United States longer than that should obtain a visa from a U.S. consulate or embassy. Visas are required of all foreign government employees, including those working for European Union institutions in the United States. In general, visas are also required for anyone seeking work in the United States.
The Department of State's Bureau of Consular Affairs recommends that applicants prepare their own documents before traveling, so there will be no delay upon arrival.
The Department of Homeland Security (DHS) administers the Visa Waiver Program (VWP), which allows qualified residents or nationals of selected countries to come to the United States for tourist or business for stays of 90 days or less without acquiring a visa. In addition, some people may be able to apply for a special type of visa called a "T Non-Immigrant" permit. The DHS decides who is eligible for the VWP and what documents they will need when they arrive at a U.S. port of entry.
In order to be eligible for the VWP, you must:
Be a national of a country that meets certain requirements. These requirements include having a government-issued passport that is valid for at least six months after your expected departure from the United States. Additionally, there are no restrictions on the number of times you can enter the VWP. However, if you are not a citizen of one of these countries, you will have to get a visa from an American embassy or consulate before arriving in the United States.
Have a valid passport that is free of apparent defects such as torn pages or cover letters.
Not be considered a threat to national security. This means that you cannot be accused of committing a crime involving violence or terrorism.
Not be listed on any terrorist watch list.
Visitors entering the United States under the Visa Waiver Program (VWP) are permitted to stay in the country for up to 90 days without the need for a visa. If you plan to stay in the country longer than that, you will have to apply for a visa.
In order to remain in the U.S. under the VWP, you must:
Have a valid passport from one of the countries that participates in the program Have a return flight scheduled after your visit is over Have no criminal records or other issues that would prevent you from traveling to the United States
The VWP allows certain citizens of participating countries to travel to the United States for tourism or business purposes without a visa. The current list of countries that participate in the VWP includes Australia, France, Germany, Italy, Japan, New Zealand, South Africa and Spain. Other countries may be added at any time.
Citizens of non-participating countries who want to enter the United States through the VWP must do so by applying for a visa through a U.S. embassy or consulate. The application process requires detailed information about your travel plans and activities while in the U.S., as well as a financial assessment to determine your eligibility to receive a visa.
Whereas VWP visitors are limited to 90 days in the US, B1 and B2 visa holders can stay for up to 6 months. Furthermore, a B1 or B2 visa holder may request for a visa extension or change their visa status to another non-immigrant (temporary) visa without leaving the country. The new visa will be issued upon receipt of your request at a U.S. consulate office or embassy outside of Vietnam.
In addition, if you require a stable job opportunity when you arrive in the United States, you can apply for an H-1B visa. This type of visa allows you to work in the United States for a single employer who has been approved by the Department of Labor to hire foreign workers. You must fulfill several requirements to be eligible for this type of visa, such as having a bachelor's degree or higher education from an American university, having sufficient experience, and paying appropriate wages. There is no limit on the number of times you can apply for an H-1B visa.
If you qualify based on a temporary job offer, then it's possible to obtain a new visa after you have entered the United States. In this case, you should submit a Change of Status form I-129 with all required documents to prove that you still meet the requirements for your visa category. Your new visa will be sent to the address listed in this form.