Correction: An earlier version of this article, while listing the requirements for applying for a tourist visa to Indonesia in advance of a trip there, failed to mention that American travelers to Indonesia may now obtain a single-entry, 30-day tourist visa upon arrival at many of the country’s ports of entry. This version includes that information.

True story: An American flew down to Brazil and got off the plane, but was soon on the next flight back to the United States, having never even sipped a caipirinha.

What happened? No visa. Serious whoops.

While the passport serves as an ID card and proof of citizenship, the tourist visa is your permission slip to enter a country. Without it, the door to that country stays closed. You can knock all you want, but you’re not getting in.

As a State Department official puts it: “No one is allowed to enter a country that they’re not a citizen of” without permission from that country. “It’s a privilege.”

Visas, stamps or stickers placed in a passport, allow countries to control the parade of incoming guests as well as weed out any safety threats, such as terrorists or potential disease-carriers. The background checks work as preemptive defenses: Governments can catch potential scofflaws before they enter their nations’ borders.

(istock, bigstock/twp)

For most U.S. citizens, however, the visa process is a mere formality, like getting your car inspection sticker. “Americans can travel to a lot of countries without a visa,” the State Department official told me, “mainly because they aren’t a risk for illegal immigration.”

In dozens of foreign destinations, it’s good to be an American. Numerous countries waive the visa requirement as part of a reciprocal agreement or because of our trusted standing in the world.

For example, we don’t need visas for the 36 countries that are part of the Visa Waiver Program (nor do their citizens need visas to visit the United States). Many Western, Central and Eastern European countries appear on the list, including the United Kingdom, Greece, France, Denmark, Spain, Italy, the Czech Republic, Slovenia and Latvia, to name a few. Some Asian nations (Japan, South Korea, Brunei) and lands Down Under (New Zealand, Australia) are also part of the arrangement. And the club is still growing: The State Department has nominated Taiwan (which already exempts Americans from visa requirements) for inclusion; the nomination is under review by the Department of Homeland Security.

A batch of countries not affiliated with the VWP also waive the requirement, with restrictions — mainly limiting the time you can spend in the country, for instance, to 30, 90 or 120 days. Among these are Ukraine; Canada, the Caribbean and most of Central and South America (minus Brazil and Paraguay); the South Pacific islands of Fiji, Tonga and Vanuatu; and a trickle of African countries, including Botswana, South Africa, Senegal and Namibia.

If you disdain extra paperwork and additional fees (from double to triple digits), you can easily spend a lifetime toodling around visa-free countries. But that plan means no pushpin for China, Russia, Nepal, Indonesia or Jordan, among others.

Visa how-tos

To determine whether you need a visa, start with the State Department's Country Specific Information, found online at The fact-packed descriptions include entry and exit details. For example, the section on Cambodia reads, “You will need a valid passport and a Cambodian visa to travel to Cambodia. Tourist and business visas are valid for one month beginning with the date of entry into Cambodia. Cambodia offers online visa processing. You may also apply in person at the Cambodian Embassy . . . Tourists and business travelers may also obtain a Cambodian visa at the airports in Phnom Penh, Siem Reap, and at all major border crossings.”

For more details, such as fees and required documents, check the Web site of the consulate or embassy, and call the office to confirm the information. (Some info, such as price hikes, might not be immediately updated online.) On its site, the Cambodian Embassy, for one, indicates the price for children (free for ages younger than 12), where you can get visa forms (online, aboard the plane and at border checkpoints in Thailand, Vietnam and Laos), and such helpful tidbits as “In order to be admitted into the country, tourists may need to demonstrate that they have sufficient funds for their stay and a return ticket.”

In general, the process is similar for every destination. You’ll need a valid passport, a completed application and a form of payment (warning: not all consulates take credit cards), plus some extra time to submit the documents and retrieve them from the consulate (in person or by mail).

A few countries, such as Turkey, Qatar and Kenya, allow travelers to procure a visa upon arrival at the airport or at border checkpoints. But Medhy Habimana, director of operations at VisaHQ, which assists travelers with the visa process, doesn’t recommend waiting till the plane lands. Apply in advance, “because you’ll want to avoid the lines at the airport,” he said, “and there may be confusion with the language.” Also, by taking care of business before you depart, you won’t risk such serious blunders as forgetting to pack passport-size photos — an oversight that could bar you from entering the country.

Start early

When writing out your vacation to-do list, put visa application at the top, even ahead of buying new luggage and calling the kennel. The process can take anywhere from a few days to several weeks. Habimana says that China typically takes four days, speedy compared with Russia’s two weeks during peak season. According to Travisa Outsourcing, which handles India’s visas, the waiting time is up to 48 hours for in-person applications and seven to nine business days by mail. Travelers squeezed for time can often pay a supplemental fee for expedited service. For example, China charges $20 more for express service (two to three business days) and $30 for same-day rush service.

To avoid meltdowns and fraught exchanges with consulate employees, do your research and be uber-organized. Go down the checklist of required documents, starting with your passport. It should be valid for at least six months after your departure date and should include several blank visa pages (not to be confused with the amendment and endorsement pages in the back).

Some countries, such as Vietnam, keep it simple, requiring a passport, a 2-by-2-inch photo, a completed application form and payment (money order, cashier’s check or certified check made payable to the embassy). Others, such as Indonesia, are more demanding: You’ll need to present a round-trip itinerary, a letter of employment and a copy of a bank statement or proof of sufficient funds from your bank. However, American travelers to Indonesia may now obtain a single-entry, 30-day tourist visa upon arrival at many of the country’s ports of entry.

“There’s a lot of stuff the embassies require,” said Habimana. “Without providing it, you won’t get a visa.”

In addition, before leaving the house on your visa quest, check the office hours, which can be highly restricted and inconvenient. The Brazilian consulate, for instance, is open only from 9 a.m. to 1 p.m. weekdays. Hours may be even more sporadic these days because of a strike by Brazilian employees in the Washington outpost. Foreign offices also close for holidays — theirs and ours.

If you’re short on time or overwhelmed by the procedure, consider hiring a third party to shepherd your application through the system. VisaHQ, with offices in Washington, New York, Ottawa and London, charges rates starting at $44.95, plus embassy fees. For other similar companies, search online for “visa services.”

“If your visa is denied,” said Habimana, “they don’t give an explanation.”

Do it right, though, and you probably won’t become a visa casualty.