Split Excursions

Hi

We've been looking into booking a day trip to Plitvice Lakes from Split and were going to use this company http://www.split-excursions.com/
but they asked for credit card details (name, address, credit card number and expiry date) on the registration form (which I should send back via email), even though they said we don't pay until we get there, so now I'm wary about doing this. Is this normal? I've never had a tour agency ask for this before. The company seem reputable, but I don't want these sort of details to fall into the wrong hands. Has anyone used this company before?

There is no need to do the booking on line for a day trip to NP Plitvice. When arriving to Split, go to the agency and charge the trip to your cc account. Other then that. their request isn't unusual, just unnecessary.