TLS provides encryption, authentication and integrity checks for data sent across a network connection. HTTPS uses TLS to protect communication between a browser and a website. TLS succeeded the older SSL protocol, although SSL remains a familiar name in website discussions. Source: Cloudflare: Transport Layer Security

Check the important routes

Ask the website provider to review HTTPS on the main domain, enquiry forms and booking journeys. Include any separate supplier domains that a visitor reaches. This gives the team a clearer view of the connections involved in a real enquiry or purchase.

Assign responsibility for renewals

Confirm who manages certificates and how renewal failures or browser warnings will be reported. Keep a named contact in the support plan. This gives colleagues an agreed route for investigation instead of asking a traveller to dismiss a warning and continue.

Written and updated by Travelgenix. Sources checked on 19 October 2026. Practical advice and examples are Travelgenix editorial guidance.