Who Checks Your Visa and Passport Before You Fly? (2026)

The short answer

Three different checks can matter before an international trip:

1. The airline check before boarding, where staff or self-service systems look for the documents required for the itinerary.
2. The government rule published by the destination country: visa-free, eVisa, ETA, visa-on-arrival, transit visa, passport validity and similar requirements.
3. The border decision on arrival, where the destination authority can still ask questions or refuse entry even if the airline boarded you.

TravelVisaRules is built around the second layer: the destination government rule. Airline tools are useful context, but they are not the same as a public, citable immigration source.

What airlines are trying to check

Airlines have to know whether you appear to have the required passport, visa, ETA, transit document or health paperwork for your route. IATA describes its IATA Travel Centre as a traveller-facing portal for passport, visa and health requirements, based on a database used by airlines and sourced from official sources. IATA’s Timatic product page describes Timatic as real-time travel-document information used by airlines, ground handlers, travel agents, security agents and government officials.

That matters because the first practical decision may happen before the border: if the airline thinks your documents are missing, you may not get on the plane. But an airline check is still a pre-boarding screen, not a visa approval.

Where Sherpa fits

Sherpa is a commercial travel-requirements platform. Its product page says it covers visa requirements, document validity, passport-specific requirements, trip context and API or embeddable tools for travel companies. Sherpa also offers eVisa, eTA and travel-authorisation application flows through embedded products.

That can be helpful when you want a guided application flow. It can also mean you are leaving the official government route and using a third-party service. British Airways, for example, describes Sherpa as a third-party provider that may charge fees while also linking travellers to the free IATA Travel Centre and to government sources where relevant.

What TravelVisaRules checks instead

For each corridor page, the stored rule is meant to come from the destination authority: a ministry, immigration service, official eVisa/ETA portal or official mission when no central page is available. The corridor page then shows:

• the verdict for ordinary short visits;
• the official source URL;
• the last-checked date;
• the stored confidence level;
• the official fee when the source publishes one.

That is why a corridor page may link to a government portal even when an airline or travel company embeds a smoother tool. The government source is the rule; a commercial checker is an interface around requirements and services.

How to use both safely

Use the official source first when the question is “am I allowed to travel?” Then use airline or Sherpa-style tools as an extra check for “will my specific booking and transit route trigger extra paperwork?”

A practical order:

1. Check the passport-to-destination corridor page here.
2. Open the linked official government source.
3. If you are flying, check your airline’s document tool or the IATA Travel Centre for itinerary-specific transit and boarding details.
4. If you use a third-party application service, compare its price with the official government fee before paying.
5. Re-check close to departure, especially for ETA, eVisa, transit and passport-validity rules.

When to be extra careful

Be more cautious when any of these apply:

• you have a connection through a third country;
• you are using two passports or a residence permit from another country;
• your passport expires soon or has few blank pages;
• your trip is for work, study, residence, medical care or family migration rather than tourism;
• the official source and an airline/commercial checker appear to disagree.

When sources disagree, use the more restrictive interpretation until the destination authority clarifies the rule. That is the safer path for YMYL travel-document guidance and the same fail-safe used in this dataset.

Bottom line

Airlines and commercial tools help you avoid boarding problems. Government sources define the rule. Treat IATA/Timatic and Sherpa-style tools as useful operational checks, but confirm the actual visa, ETA, eVisa, transit and passport-validity rule with the destination authority before booking or travelling.

This is general information, not legal or immigration advice. Confirm the current rule with the official source for your destination and with your airline before you travel.