10.11.2025
Not all electronic travel documents grant the right to enter a country. We explain the key differences between an e-visa and an electronic travel authorization, how they are issued, and how to avoid mistakes when planning your trip.
Applying for entry documents online has become standard in many countries. It seems simple: you fill out a form, pay the fee, and receive confirmation by email. However, this is where many travelers make a critical mistake — confusing an electronic visa (e-visa) with an electronic travel authorization (ETA). Choosing the wrong one can not only cost you money but also lead to being denied boarding.
Applications for both are submitted online; the information is verified automatically, and the authorization is issued electronically and linked to your passport. This is part of the global digitalization of border control: governments aim to pre-screen travelers in advance in order to ease the workload on consulates and speed up boarding procedures at airports. However, the similarities end there — these documents differ fundamentally in their legal status and implications for travel.
At first glance, the documents look similar: you receive a confirmation code linked to your passport, which you present before departure. However, there is an essential distinction: an e-visa is an official permission to enter and stay in a country, while an ETA only allows boarding and pre-screening. It is also important to understand that no visa — electronic or traditional — guarantees entry. The final decision always rests with the country’s border authorities. If an officer has any doubts about the purpose of the trip, documents, or the traveler’s behavior, they have the right to deny entry, even if the visitor holds a valid visa.
An electronic visa is the digital equivalent of a traditional visa: it is an official permit to enter and stay in the country for a specified period and for a designated purpose. It is not a simplified version, but a full visa document. The visa is recorded in the electronic system, and the applicant’s information is transmitted to the destination country’s border authorities prior to entry.
Examples of countries that require an e-visa include:
Vietnam: issues e-visas to citizens of all countries for up to 90 days, allowing single or multiple entries.
India: offers several types of e-visas (such as tourist, business, medical) with varying validity periods, such as 30 days, 1 year, or 5 years.
Saudi Arabia: the tourist e-visa is valid for one year, allows multiple entries, and permits stays of up to 90 days.
Kenya and Sri Lanka also require an e-visa for most foreign nationals, even for short tourist trips.
For more information on applying for an e-visa and the requirements in various countries, see our dedicated article here.
An electronic travel authorization (known as ESTA, eTA, ETA, K-ETA, etc.) is a pre-screening requirement for citizens who are normally visa-exempt. It is linked to your passport and is mandatory for boarding your flight; however, it does not grant a formal visa status or replace a visa where one is required.
Countries using electronic travel authorization systems include:
– the USA: ESTA, valid for 2 years;
– Canada: eTA, valid for 5 years or until the passport expires;
– the United Kingdom: ETA, valid for 2 years;
– New Zealand: NZeTA, valid for 2 years;
– South Korea: K-ETA, valid for 2 years.
The purpose of an electronic travel authorization is to conduct a quick background check for security and immigration risks within the visa-free travel channel. It is required for travelers who do not need a visa under international agreements or national law, but whom authorities want to screen before boarding. Governments are clear: not having a valid ETA will prevent you from boarding your flight.
An electronic travel authorization does not grant the right to stay long-term, extend a stay, or change status within the country. For study, work, or long-term migration, the appropriate visas are required.
An electronic visa is a true visa — an official decision by the competent authority granting entry and specifying the conditions and duration of stay. An ETA, on the other hand, serves a pre-travel clearance for visa-exempt travelers.
Electronic travel authorizations generally have longer validity periods than visas. For example, Canada’s eTA is valid for 5 years, the U.S. ESTA — for 2 years, and the U.K. ETA and New Zealand’s NZeTA are also valid for 2 years. This is convenient for travelers, as there is no need to submit a new application before every trip.
E-visas work differently. Most are issued for a specific trip, typically valid for 30, 60, or 90 days. Some exceptions include India, which offers tourist e-visas valid for 1 or 5 years, and Saudi Arabia, which provides a one-year tourist e-visa with multiple-entry privileges.
In simple terms, electronic travel authorizations tend to have longer validity, often two to five years, while e-visas are typically tied to a single trip. Some countries, however, issue long-term e-visas for frequent travelers or business purposes.
Electronic travel authorizations are available only to citizens of visa-exempt countries. If a country requires a visa under national law or international agreements, travelers must obtain an e-visa or a traditional visa. For example, Vietnam explicitly states that an e-visa is available to citizens of all countries for up to 90 days, and entry via an ETA is not permitted.
When applying for an e-visa, the requirements are generally stricter than for an ETA. In addition to a standard application and photo, additional supporting documents may be required:
- business visa: invitation to a conference, or a letter from a business partner or employer;
- medical visa: a certificate from a clinic, proof of treatment, or hospitalization confirmation;
- student visa: an enrollment letter or course registration confirmation.
These documents demonstrate the purpose of the trip and are required for e-visa approval. This is one of the key differences from an ETA, which is issued without supporting documents and is intended only for short-term tourist or transit travel.
To determine the appropriate travel document:
Check the visa regime between your country and the destination.
Review official requirements: if it states “visa required”, you need an e-visa; if it says “visa-exempt with authorization”, an ETA is sufficient.
Determine whether your travel is for tourism, business, or transit, as this affects the type of document you will need.
Use trusted resources — for example, the Terrana service, where you only need to enter your citizenship and destination country to receive a precise list of available visas and authorizations.
For complex routes or unclear transit rules, using a tool that aggregates visa and authorization requirements by country is recommended. If you’re uncertain about the appropriate category, Terrana experts can review your itinerary, verify compliance with entry conditions, and advise on potential refusal risks.
E-visas and electronic travel authorizations serve different purposes. An e-visa is an official decision granting entry with specific conditions of stay, while an electronic travel authorization (ETA) acts as a digital pre-screening for visa-exempt travelers, with the final decision made at the border. When traveling, those who consult official sources, verify the validity of their documents, and match the purpose of their visit with the correct type of authorization have the advantage. This ensures a predictable, stress-free experience at both check-in and passport control, without delays or rescheduled flights.
