How do agencies protect my personal data?
Reputable Sri Lankan agencies protect your information by using secure, encrypted booking platforms, and they keep up with global data privacy guidelines like GDPR, so yes, your passport copies and payment details are used only for the logistics that have to happen.
Professional DMCs will only pass your key details to the direct service providers, like a hotel that needs check-in information or government portals used for ticketing. Before you confirm anything, you should always look over the operator's privacy policy, so you can be sure they do not sell customer data to third-party advertisers.